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Solid Biosciences Inc
(NASDAQ:SLDB) 

SLDB stock logo

Solid Biosciences Inc., a life science company, engages in developing therapies for duchenne muscular dystrophy (DMD) in the United States. The company's lead product candidate is SGT-001, a gene transfer candidate, which is in a Phase I/II clinical trial to drive functional dystrophin protein expre...

Founded: 2013
Full Time Employees: 121
Sector: Healthcare
Industry: Drug Manufacturers-Specialty & Generic

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At a glance:
Bull Thesis:
Bear Thesis:
Main Competitors:
Moat:
Income Statements:
Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 
                                      
      operating expenses:
                                      
      research and development
    46,140,000 38,135,000 38,861,000 32,415,000 30,914,000 30,770,000 27,327,000 19,461,000 18,873,000 15,453,000 16,702,000 19,777,000 24,631,000 21,290,000 14,005,000 23,180,000 19,945,000 14,595,000 14,425,000 15,513,000 14,206,000 15,723,000 16,045,000 13,448,000 19,665,000 27,066,000 22,792,000 21,610,000 23,269,000 17,762,000 14,680,000 13,594,000 11,929,000  
      general and administrative
    11,168,000 11,268,000 9,197,000 9,278,000 9,138,000 9,126,000 7,855,000 8,327,000 7,989,000 6,812,000 6,412,000 7,129,000 7,399,000 7,618,000 7,127,000 6,851,000 7,352,000 7,211,000 7,143,000 6,766,000 6,015,000 5,624,000 5,181,000 5,526,000 5,250,000 5,264,000 6,925,000 5,359,000 7,033,000 4,624,000 4,470,000 4,584,000 4,044,000  
      total operating expenses
    57,308,000 49,403,000 48,058,000 41,693,000 40,052,000 39,896,000 35,182,000 27,788,000 26,862,000 22,265,000 23,114,000 26,843,000 32,030,000 34,566,000 21,132,000 31,551,000 27,297,000 21,806,000 21,568,000 22,279,000 20,221,000 21,347,000 21,226,000 18,974,000 26,859,000 32,330,000 29,717,000 26,969,000 30,302,000 22,386,000 19,150,000 18,178,000 15,973,000  
      income from operations
    -57,308,000 -49,403,000 -48,058,000 -41,693,000 -40,052,000 -39,896,000 -35,182,000 -27,788,000 -26,862,000 -22,265,000 -23,114,000 -26,843,000 -32,030,000 -34,566,000 -21,132,000 -25,382,000 -25,372,000 -18,652,000 -18,031,000 -18,685,000 -16,886,000 -21,347,000 -21,226,000 -18,974,000 -26,859,000 -32,330,000 -29,717,000 -26,969,000 -30,302,000 -22,386,000 -19,150,000 -18,178,000 -15,973,000  
      yoy
    43.08% 23.83% 36.60% 50.04% 49.10% 79.19% 52.21% 3.52% -16.13% -35.59% 9.38% 5.76% 26.24% 85.32% 17.20% 35.84% 50.25% -12.62% -15.05% -1.52% -37.13% -33.97% -28.57% -29.65% -11.36% 44.42% 55.18% 48.36% 89.71%      
      qoq
    16.00% 2.80% 15.27% 4.10% 0.39% 13.40% 26.61% 3.45% 20.65% -3.67% -13.89% -16.19% -7.34% 63.57% -16.74% 0.04% 36.03% 3.44% -3.50% 10.65% -20.90% 0.57% 11.87% -29.36% -16.92% 8.79% 10.19% -11.00% 35.36% 16.90% 5.35% 13.80%   
      operating margin %
    -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% NaN% NaN% NaN% -Infinity% NaN% NaN% NaN% -Infinity% NaN% NaN% NaN%  
      other income, net:
                                      
      interest income
    2,064,000 2,052,000 2,586,000 2,966,000 2,300,000 1,925,000 2,328,000 2,565,000 2,651,000 1,659,000 1,856,000 1,949,000 1,678,000       -13,000 -14,000 -16,000 -20,000 -13,000 164,000 299,000 406,000 367,000 508,000 382,000 92,000 80,000 65,000  
      interest expense
     -5,000 336,000 -60,000 -68,000 -75,000 -82,000 -88,000 -95,000                          
      change in fair value of derivative liabilities
    -1,650,000 -2,650,000 -850,000 -900,000 -1,650,000                              
      other income
    157,000 219,000 210,000 207,000 188,000 199,000 211,000 239,000 3,000 270,000 278,000 265,000 282,000 -1,437,000 722,000 290,000 44,000 -22,000 48,000 3,000     1,000 170,000 56,000 77,000 212,000 83,000 38,000 118,000 31,000  
      total other income
    571,000 -384,000 2,282,000 2,213,000 770,000 -2,701,000 2,457,000 2,716,000 2,559,000 1,929,000 2,134,000 2,214,000 1,960,000       -10,000 -14,000 -16,000 -20,000 -13,000 165,000 469,000 462,000 444,000 720,000 465,000 130,000 198,000 96,000  
      net income
    -56,737,000 -49,787,000 -45,776,000 -39,480,000 -39,282,000 -42,597,000 -32,725,000 -25,072,000 -24,303,000 -20,336,000 -20,980,000 -24,629,000 -30,070,000 -15,151,000 -20,410,000 -25,092,000 -25,328,000 -18,610,000 -17,983,000 -18,695,000 -16,900,000 -21,363,000 -21,246,000 -18,987,000 -26,694,000 -31,861,000 -29,255,000 -26,525,000 -29,582,000 -21,921,000 -19,020,000 -17,980,000 -15,877,000  
      yoy
    44.44% 16.88% 39.88% 57.47% 61.63% 109.47% 55.98% 1.80% -19.18% 34.22% 2.79% -1.85% 18.72% -18.59% 13.50% 34.22% 49.87% -12.89% -15.36% -1.54% -36.69% -32.95% -27.38% -28.42% -9.76% 45.34% 53.81% 47.53% 86.32%      
      qoq
    13.96% 8.76% 15.95% 0.50% -7.78% 30.17% 30.52% 3.16% 19.51% -3.07% -14.82% -18.09% 98.47% -25.77% -18.66% -0.93% 36.10% 3.49% -3.81% 10.62% -20.89% 0.55% 11.90% -28.87% -16.22% 8.91% 10.29% -10.33% 34.95% 15.25% 5.78% 13.25%   
      net income margin %
    -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% -Infinity% NaN% NaN% NaN% -Infinity% NaN% NaN% NaN% -Infinity% NaN% NaN% NaN%  
      net income per share
    -0.52 -0.53 -0.48 -0.42 -0.59 -1.02 -0.79 -0.61 -0.64 -1 -1.05 -1.25 -1.54 -0.68 -2.71 -0.22 -0.22 -0.17 -0.16 -0.17 -0.19 -0.31 -0.44 -0.39 -0.56 -0.65 -0.67 -0.76 -0.85 -0.64 -0.55 -0.52 -0.54  
      weighted-average shares of common stock outstanding, used to compute basic and diluted net loss per share
    109,811,461  94,417,746 94,140,286 66,341,305                              
      restructuring charges
             -15,750  -63,000  380,000  1,520,000      486,000   1,944,000          
      weighted-average shares of common stock outstanding, basic and diluted
          41,443,317 40,934,361 38,155,373  20,059,641 19,663,672 19,567,635  7,532,706 112,859,461 112,607,322  112,312,970 112,298,982 89,267,194  48,295,468 48,163,094 48,059,279  43,467,618 34,843,344 34,776,488  34,539,001 34,449,758 29,354,650  
      collaboration revenue - related party
                 2,023,500  6,169,000 1,925,000 2,616,500 3,537,000 3,594,000 3,335,000              
      other income:
                                      
      revenue
                                      
      yoy
                          NaN% NaN% NaN%  NaN% NaN% NaN%      
      qoq
                          NaN% NaN%   NaN% NaN%   NaN% NaN%   
      revaluation of preferred unit tranche rights
                                      
      net loss attributable to non-controlling interest
                                      
      net loss attributable to solid biosciences inc.
                                 -21,921,000 -19,020,000 -17,980,000 -15,877,000  
      accretion of preferred units to redemption value
                                      
      redemption of preferred units
                                      
      redemption of redeemable interest from non-controlling interest in solid gt
                                      
      net loss attributable to common stockholders
                                 -21,921,000 -19,020,000 -17,980,000 -15,877,000  
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 
                                       
        assets
                                       
        current assets:
                                       
        cash and cash equivalents
      297,099,000 59,900,000 61,364,000 138,933,000 210,629,000 80,235,000 64,394,000 95,854,000 117,574,000 74,015,000 49,037,000 91,569,000 164,649,000 155,384,000 48,790,000 54,311,000 129,711,000 119,136,000 109,676,000 200,609,000 268,497,000 154,744,000 24,797,000 40,441,000 53,187,000 76,043,000 94,720,000 51,836,000 53,994,000 86,366,000 129,137,000 145,824,000 164,773,000 
        available-for-sale securities
      83,581,000 127,950,000 174,778,000 129,177,000 96,289,000 68,685,000 106,723,000 94,412,000 88,492,000 49,625,000 93,847,000 68,623,000 20,860,000 58,338,000 93,367,000 108,572,000 50,339,000 88,643,000 120,084,000 48,350,000      7,481,000    36,098,000    
        prepaid expenses and other current assets
      15,470,000 16,384,000 8,710,000 10,530,000 6,491,000 8,382,000 8,377,000 7,344,000 8,126,000 6,094,000 5,462,000 7,283,000 5,095,000 5,916,000 5,115,000 7,319,000 18,544,000 14,723,000 8,366,000 5,743,000 5,518,000 4,157,000 2,365,000 3,094,000 4,316,000 2,778,000 7,829,000 10,935,000 7,043,000 6,175,000 3,062,000 1,714,000 1,931,000 
        restricted cash, current
      638,000 1,222,000             237,000 237,000   90,000 90,000              
        total current assets
      396,788,000 205,456,000 244,852,000 278,640,000 313,409,000 157,302,000 179,494,000 197,610,000 214,192,000 129,734,000 148,346,000 167,475,000 190,604,000 219,638,000 147,509,000 170,439,000 198,608,000 222,612,000 238,810,000 255,078,000 274,295,000 158,901,000 27,162,000 43,535,000 57,903,000 86,302,000 113,492,000 78,321,000 101,787,000 128,639,000 148,431,000 164,473,000 184,378,000 
        non-current assets:
                                       
        operating lease, right-of-use assets
      21,300,000 21,924,000 22,535,000 23,133,000 23,720,000  24,859,000 25,508,000 26,098,000  27,189,000 27,841,000 28,306,000  28,444,000 28,939,000 722,000  1,218,000 1,581,000 3,196,000  3,951,000 4,310,000 4,655,000  5,529,000 5,618,000 5,916,000     
        property and equipment
      3,914,000 4,169,000 4,356,000 4,317,000 4,483,000 4,747,000 5,067,000 5,438,000 6,391,000 6,624,000 7,045,000 7,391,000 8,607,000 9,657,000 6,266,000 6,847,000 6,097,000 6,462,000 6,886,000 7,128,000 7,461,000 8,153,000 8,869,000 9,582,000 10,866,000 11,645,000 11,369,000 11,829,000 11,995,000 10,422,000 7,935,000 6,551,000 4,418,000 
        other non-current assets
      183,000 223,000 247,000 278,000 319,000 366,000 475,000 515,000 175,000 209,000 315,000 181,000 238,000 175,000 422,000 438,000 59,000 94,000    209,000 209,000 209,000 209,000 209,000 209,000 209,000 209,000 209,000 209,000 209,000 209,000 
        restricted cash, net of current portion
      708,000 768,000                                
        total non-current assets
      26,105,000 27,084,000 29,062,000 29,652,000 30,495,000 31,360,000 32,332,000 33,371,000                          
        total assets
      422,893,000 232,540,000 273,914,000 308,292,000 343,904,000 188,662,000 211,826,000 230,981,000 248,689,000 164,939,000 184,728,000 204,721,000 229,588,000 260,252,000 184,474,000 208,496,000 207,556,000 232,380,000 248,986,000 265,857,000 285,279,000 171,169,000 40,518,000 57,963,000 73,960,000 103,471,000 130,926,000 96,304,000 120,234,000 139,597,000 156,812,000 171,470,000 189,242,000 
        liabilities and stockholders’ equity
                                       
        current liabilities:
                                       
        accounts payable
      5,563,000 3,224,000 8,429,000 4,704,000 6,439,000 4,237,000 3,458,000 2,521,000 1,730,000 2,032,000 1,898,000 2,968,000 5,595,000 3,238,000 5,150,000 5,109,000 4,761,000 4,463,000 4,148,000 3,003,000 3,194,000 3,274,000 4,083,000 2,793,000 2,383,000 7,124,000 3,210,000 5,600,000 5,352,000 3,691,000 4,804,000 3,741,000 5,835,000 
        accrued expenses and other current liabilities
      19,182,000 18,945,000 19,050,000 16,546,000 14,576,000 19,852,000 13,227,000 9,918,000                     7,409,000  5,833,000 4,938,000 4,092,000 
        operating lease liabilities, current
      2,188,000 2,103,000                                
        derivative liabilities
      3,350,000 9,200,000 6,550,000 5,700,000 4,800,000 3,150,000 3,400,000                           
        total current liabilities
      30,283,000 33,472,000 36,342,000 29,846,000 28,779,000 30,257,000 22,854,000 14,688,000 14,339,000 14,517,000 15,816,000 15,866,000 20,293,000 22,508,000 16,925,000 21,718,000 21,744,000 23,601,000 22,542,000 22,545,000 22,829,000 24,480,000 14,765,000 13,168,000 12,880,000 18,276,000 16,750,000 13,671,000 14,572,000 12,481,000 10,637,000 8,679,000 9,927,000 
        non-current liabilities:
                                       
        operating lease liabilities, net of current portion
      18,478,000 19,058,000    21,159,000                            
        total non-current liabilities
      18,478,000 19,058,000 19,624,000 20,155,000 20,662,000 21,159,000 21,950,000 23,048,000                          
        total liabilities
      48,761,000 52,530,000 55,966,000 50,001,000 49,441,000 51,416,000 44,804,000 37,736,000 37,965,000 38,458,000 40,367,000 40,993,000 45,801,000 48,586,000 41,199,000 46,261,000 22,045,000 24,169,000 25,623,000 27,919,000 32,279,000 39,083,000 18,287,000 17,250,000 17,504,000 23,423,000 22,401,000 19,809,000 21,121,000 14,414,000 11,739,000 9,178,000 10,292,000 
        commitments and contingencies
                                       
        stockholders' equity:
                                       
        preferred stock, 0.001 par value...
                                       
        common stock, 0.001 par value...
      98,000 79,000    40,000    20,000 20,000 20,000 20,000 20,000 8,000 112,000 112,000 112,000 112,000 112,000 112,000 87,000 48,000 48,000 48,000 48,000 48,000 35,000 35,000 35,000 35,000 35,000 35,000 
        additional paid-in capital
      1,388,559,000 1,137,654,000 1,125,810,000 1,120,463,000 1,117,116,000 920,609,000 907,720,000 901,349,000 893,746,000 785,199,000 782,756,000 781,131,000 776,570,000 774,452,000 691,050,000 689,422,000 687,535,000 684,901,000 681,420,000 678,001,000 674,357,000 536,568,000 405,389,000 402,625,000 399,382,000 396,278,000 392,897,000 331,620,000 327,709,000 324,209,000 322,179,000 320,382,000 319,073,000 
        accumulated other comprehensive income
      -13,000 52,000 48,000 -38,000 2,000 47,000 116,000 -15,000 -4,000 15,000 2,000 14,000 5,000                     
        accumulated deficit
      -1,014,512,000 -957,775,000 -907,988,000 -862,212,000 -822,732,000 -783,450,000 -740,853,000 -708,128,000 -683,056,000 -658,753,000 -638,417,000 -617,437,000 -592,808,000 -562,738,000 -547,587,000 -527,177,000 -502,085,000 -476,757,000 -458,147,000 -440,164,000 -421,469,000 -404,569,000 -383,206,000 -361,960,000 -342,973,000 -316,279,000 -284,418,000 -255,163,000 -228,638,000 -199,056,000 -177,135,000 -158,115,000 -140,135,000 
        total stockholders’ equity
      374,132,000 180,010,000 217,948,000 258,291,000 294,463,000  167,022,000 193,245,000 210,724,000  144,361,000 163,728,000 183,787,000  143,275,000 162,235,000 185,511,000  223,363,000 237,938,000 253,000,000  22,231,000 40,713,000 56,456,000  108,525,000 76,495,000 99,113,000     
        total liabilities and stockholders’ equity
      422,893,000 232,540,000 273,914,000 308,292,000 343,904,000  211,826,000 230,981,000 248,689,000  184,728,000 204,721,000 229,588,000  184,474,000 208,496,000 207,556,000  248,986,000 265,857,000 285,279,000  40,518,000 57,963,000 73,960,000  130,926,000 96,304,000 120,234,000     
        finance lease liabilities
        281,000 953,000 1,096,000 1,231,000 1,051,000 525,000 496,000 469,000     353,000 412,000 239,000 232,000 226,000 220,000 214,000 208,000 202,000 197,000 191,000 186,000 181,000 176,000 178,000     
        stockholders’ equity:
                                       
        restricted cash
        1,924,000 1,924,000 1,973,000 1,952,000 1,931,000 1,910,000 1,833,000 1,833,000 1,833,000 1,833,000 1,833,000 1,833,000 1,833,000 1,833,000 2,070,000 2,070,000    327,000 327,000 327,000 327,000 327,000 327,000 327,000 327,000 327,000   65,000 
        operating lease liabilities
        2,032,000 1,943,000 1,868,000 1,787,000 1,718,000 1,724,000 1,694,000 1,855,000 1,847,000 1,853,000 1,863,000 1,897,000 1,062,000 33,000 984,000 1,263,000 1,227,000 1,499,000 1,965,000 1,999,000 1,930,000 1,863,000 1,799,000 1,736,000 1,672,000 1,610,000 1,278,000     
        operating lease liabilities, excluding current portion
        19,624,000 20,155,000 20,662,000  21,643,000 22,095,000 22,526,000 22,707,000 23,189,000 23,645,000 23,912,000 24,279,000 24,274,000 24,543,000 70,000 275,000 468,000 656,000 1,980,000 2,419,000 2,943,000 3,450,000 3,941,000 4,414,000 4,869,000 5,309,000 5,736,000     
        preferred stock, 0.001 par value — 10,000,000 shares authorized; no shares issued or outstanding at september 30, 2025 and december 31, 2024
                                       
        common stock
        78,000 78,000 77,000  39,000 39,000 38,000                         
        preferred stock, 0.001 par value — 10,000,000 shares authorized; no shares issued or outstanding at june 30, 2025 and december 31, 2024
                                       
        preferred stock, 0.001 par value — 10,000,000 shares authorized; no shares issued or outstanding at march 31, 2025 and december 31, 2024
                                       
        operating lease, right-of-use asset
           24,295,000    26,539,000    28,949,000                    
        liabilities and stockholders' equity
                                       
        finance lease obligations, net of current portion
                                       
        total stockholders' equity
           137,246,000    126,481,000    211,666,000    208,211,000    132,086,000    80,048,000        
        total liabilities and stockholders' equity
           188,662,000    164,939,000    260,252,000    232,380,000    171,169,000    103,471,000        
        finance lease liabilities, excluding current portion
            307,000 953,000 1,100,000        231,000  353,000 412,000 469,000  579,000 632,000 683,000  782,000 829,000 813,000     
        preferred stock, 0.001 par value — 10,000,000 shares authorized; no shares issued and outstanding at september 30, 2024 and december 31, 2023
                                       
        preferred stock, 0.001 par value — 10,000,000 shares authorized; no shares issued and outstanding at june 30, 2024 and december 31, 2023
                                       
        accrued expenses
              10,327,000 10,137,000 11,466,000 10,509,000 12,384,000 16,691,000 10,275,000 16,141,000 9,440,000 9,528,000 8,003,000 7,714,000 6,794,000 8,640,000 8,550,000 8,315,000 8,507,000 9,178,000 11,466,000 6,007,000  8,235,000    
        other current liabilities
              92,000 24,000 162,000 117,000 55,000 14,000 85,000 23,000 150,000 35,000 73,000 61,000      52,000 221,000 278,000 355,000 382,000    
        preferred stock, 0.001 par value — 10,000,000 shares authorized; no shares issued and outstanding at march 31, 2024 and december 31, 2023
                                       
        finance lease obligations, excluding current portion
               1,234,000        293,000    525,000    733,000        
        other non-current liabilities
                   96,000        1,300,000        1,074,000 1,102,000 499,000 365,000 
        finance liabilities and finance lease liabilities
                443,000 419,000 396,000 668,000                    
        finance liabilities and finance lease liabilities, excluding current portion
                1,362,000 1,482,000 1,596,000                     
        accounts receivable - related party
                      14,000 110,000 594,000 286,000 280,000             
        deferred revenue - related party
                      6,170,000 8,080,000 8,865,000 10,048,000 10,662,000 10,359,000            
        finance liabilities and finance lease obligations, excluding current portion
                   1,703,000                    
        accumulated other comprehensive loss
                   -68,000 -196,000 -122,000 -51,000 -45,000 -22,000 -11,000       -2,000   -5,000 -6,000 -10,000 -23,000 
        operating lease, right of use asset
                       1,142,000    3,579,000    4,988,000        
        deferred revenue - related party, excluding current portion
                        2,260,000 4,306,000 7,001,000 10,359,000            
        restricted cash, excluding current portion
                        2,072,000 2,070,000 327,000             
        accumulated other comprehensive gain
                              -1,000 1,000  3,000 7,000     
        available-for-sale-securities
                              400,000  10,943,000 15,550,000 40,750,000  16,232,000 16,935,000 17,609,000 
        deferred offering costs
                                       
        liabilities, preferred units and stockholders' / members' equity /
                                       
        current portion of capital lease obligations
                                   173,000    
        capital lease obligations, net of current portion
                                   859,000    
        series 2 senior preferred units, no units authorized at december 31, 2018 and 4,886,000 units authorized at december 31, 2017; no units issued and outstanding at december 31, 2018 and 4,886,000 units issued and outstanding at december 31, 2017
                                       
        series 1 senior preferred units, no units authorized at december 31, 2018 and 2,500,000 units authorized at december 31, 2017; no units issued and outstanding at december 31, 2018 and 2,500,000 units issued and outstanding at december 31, 2017
                                       
        junior preferred units, no units authorized at december 31, 2018 and 4,414,356 units authorized at december 31, 2017; no units issued and outstanding at december 31, 2018 and 4,414,356 units issued and outstanding at december 31, 2017
                                       
        stockholders’ / members’ equity /
                                       
        series a, b, c and d common units, no units authorized at december 31, 2018 and 20,189,509 units authorized at december 31, 2017; no units issued and outstanding at december 31, 2018 and 19,438,552 units issued and outstanding at december 31, 2017
                                       
        total stockholders'/members’ equity/
                                   125,183,000    
        total liabilities, preferred units and stockholders'/members’ equity
                                   139,597,000    
        liabilities, preferred units and stockholders’ / members’ equity /
                                       
        series 2 senior preferred units, no units authorized at september 30, 2018 and 4,886,000 units authorized at december 31, 2017; no units issued and outstanding at september 30, 2018 and 4,886,000 units issued and outstanding at december 31, 2017
                                       
        series 1 senior preferred units, no units authorized at september 30, 2018 and 2,500,000 units authorized at december 31, 2017; no units issued and outstanding at september 30, 2018 and 2,500,000 units issued and outstanding at december 31, 2017
                                       
        junior preferred units, no units authorized at september 30, 2018 and 4,414,356 units authorized at december 31, 2017; no units issued and outstanding at september 30, 2018 and 4,414,356 units issued and outstanding at december 31, 2017
                                       
        series a, b, c and d common units, no units authorized at september 30, 2018 and 20,189,509 units authorized at december 31, 2017; no units issued and outstanding at september 30, 2018 and 19,438,552 units issued and outstanding at december 31, 2017
                                       
        total stockholders’/members’ equity/
                                    145,073,000 162,292,000 178,950,000 
        total liabilities, preferred units and stockholders’/members’ equity
                                    156,812,000 171,470,000 189,242,000 
        revenue
                                       
        operating expenses:
                                       
        research and development
                                    14,680,000 13,594,000 11,929,000 
        general and administrative
                                    4,470,000 4,584,000 4,044,000 
        total operating expenses
                                    19,150,000 18,178,000 15,973,000 
        income from operations
                                    -19,150,000 -18,178,000 -15,973,000 
        other income:
                                       
        revaluation of preferred unit tranche rights
                                       
        interest income
                                    92,000 80,000 65,000 
        other income
                                    38,000 118,000 31,000 
        total other income
                                    130,000 198,000 96,000 
        net income
                                    -19,020,000 -17,980,000 -15,877,000 
        net income attributable to non-controlling interest
                                       
        net income attributable to solid biosciences inc.
                                    -19,020,000 -17,980,000 -15,877,000 
        accretion of preferred units to redemption value
                                       
        redemption of preferred units
                                       
        redemption of redeemable interest from non-controlling interest in solid gt
                                       
        net income attributable to common stockholders
                                    -19,020,000 -17,980,000 -15,877,000 
        net income per share
                                    -550 -520 -540 
        weighted-average shares of common stock outstanding, basic and diluted
                                    34,539,001,000 34,449,758,000 29,354,650,000 
        series 2 senior preferred units, no units authorized at june 30, 2018 and 4,886,000 units authorized at december 31, 2017; no units issued and outstanding at june 30, 2018 and 4,886,000 units issued and outstanding at december 31, 2017
                                       
        series 1 senior preferred units, no units authorized at june 30, 2018 and 2,500,000 units authorized at december 31, 2017; no units issued and outstanding at june 30, 2018 and 2,500,000 units issued and outstanding at december 31, 2017
                                       
        junior preferred units, no units authorized at june 30, 2018 and 4,414,356 units authorized at december 31, 2017; no units issued and outstanding at june 30, 2018 and 4,414,356 units issued and outstanding at december 31, 2017
                                       
        series a, b, c and d common units, no units authorized at june 30, 2018 and 20,189,509 units authorized at december 31, 2017; no units issued and outstanding at june 30, 2018 and 19,438,552 units issued and outstanding at december 31, 2017
                                       
        series 2 senior preferred units, no units authorized at march 31, 2018 and 4,886,000 units authorized at december 31, 2017; no units issued and outstanding at march 31, 2018 and 4,886,000 units issued and outstanding at december 31, 2017
                                       
        series 1 senior preferred units, no units authorized at march 31, 2018 and 2,500,000 units authorized at december 31, 2017; no units issued and outstanding at march 31, 2018 and 2,500,000 units issued and outstanding at december 31, 2017
                                       
        junior preferred units, no units authorized at march 31, 2018 and 4,414,356 units authorized at december 31, 2017; no units issued and outstanding at march 31, 2018 and 4,414,356 units issued and outstanding at december 31, 2017
                                       
        series a, b, c and d common units, no units authorized at march 31, 2018 and 20,189,509 units authorized at december 31, 2017; no units issued and outstanding at march 31, 2018 and 19,438,552 units issued and outstanding at december 31, 2017
                                       
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 
                                         
          cash flows from operating activities:
                                         
          net loss
        -56,737,000 -49,787,000 -45,776,000 -39,480,000 -39,282,000 -42,597,000 -32,725,000 -25,072,000 -24,303,000 -20,336,000 -20,980,000 -24,629,000 -30,070,000 -15,151,000 -20,410,000 -25,092,000 -25,328,000 -18,610,000 -17,983,000 -18,695,000 -16,900,000 -21,363,000 -21,246,000 -18,987,000 -26,694,000 -31,861,000 -29,255,000 -26,525,000 -29,582,000 -21,921,000 -19,020,000 -17,980,000 -15,877,000 
          adjustments to reconcile net loss to net cash from operating activities:
                                         
          amortization of discount on available-for-sale securities
        -619,000 -747,000 -327,000 -488,000 -312,000  -1,208,000 -1,041,000 -540,000                         
          equity-based compensation expense
        5,152,000 6,500,000 3,928,000 3,145,000 3,341,000 3,821,000 2,995,000 2,092,000 1,611,000 1,938,000 1,625,000 1,944,000 2,118,000 1,587,000 1,524,000 1,814,000 2,612,000 3,415,000 3,416,000 3,635,000 2,907,000 2,518,000 2,764,000 3,243,000 3,104,000 3,404,000 3,392,000 3,911,000 3,500,000 2,030,000 1,797,000 1,309,000 819,000 
          depreciation and amortization expense
        395,000 467,000 376,000 386,000 407,000                             
          non-cash lease expense
        623,000 611,000 598,000 587,000 575,000 565,000 585,000                           
          change in fair value of derivative liabilities
        1,650,000 2,650,000 850,000 900,000 1,650,000                             
          other
         -294,000 77,000 -22,000 2,000 4,000 -89,000 -5,000                         
          changes in operating assets and liabilities:
                                         
          prepaid expenses and other assets
        954,000 -7,649,000 1,716,000 -4,083,000 2,023,000  -993,000 -219,000 -1,337,000                         
          accounts payable
        2,321,000 -5,257,000 3,697,000 6,000 461,000 815,000 918,000 1,068,000 -596,000 134,000 -929,000 -2,714,000 2,745,000 -5,906,000 287,000 302,000 71,000 570,000 957,000 -228,000 -90,000 -829,000 1,290,000 417,000 -4,309,000 3,771,000 -2,429,000 771,000 1,666,000 -1,503,000 950,000 -703,000 -354,000 
          change in operating lease liability
        -496,000                                 
          accrued expenses and other liabilities
        -473,000 152,000 2,203,000 1,970,000 -275,000  3,309,000 93,000 -260,000                         
          net cash from operating activities
        -47,230,000 -53,555,000 -33,472,000 -37,412,000 -31,850,000 -29,645,000 -23,708,000 -21,467,000 -25,192,000 -20,823,000 -17,897,000 -27,465,000 -27,995,000 -34,480,000 -20,429,000 -15,878,000 -27,190,000 -20,874,000 -18,424,000 -17,100,000 -21,366,000 1,307,000 -15,564,000 -13,068,000 -29,274,000 -21,245,000 -19,241,000 -26,301,000 -25,927,000 -21,404,000 -15,290,000 -16,331,000 -17,172,000 
          capital expenditures
        -165,000 -565,000 -85,000 -377,000 -126,000 -204,000 -15,000 -286,000 -149,000 -90,000 -383,000 -536,000 -506,000 -856,000 -839,000 -1,136,000 -184,000 -660,000 -237,000 -349,000 -35,000 -60,000 -80,000 -78,000 -681,000 -645,000 -650,000 -1,139,000 -1,953,000 -1,437,000 -2,122,000 -3,216,000 -1,001,000 
          free cash flows
        -47,395,000 -54,120,000 -33,557,000 -37,789,000 -31,976,000 -29,849,000 -23,723,000 -21,753,000 -25,341,000 -20,913,000 -18,280,000 -28,001,000 -28,501,000 -35,336,000 -21,268,000 -17,014,000 -27,374,000 -21,534,000 -18,661,000 -17,449,000 -21,401,000 1,247,000 -15,644,000 -13,146,000 -29,955,000 -21,890,000 -19,891,000 -27,440,000 -27,880,000 -22,841,000 -17,412,000 -19,547,000 -18,173,000 
          cash flows from investing activities:
                                         
          purchases of property and equipment
        -165,000 -565,000 -85,000 -377,000 -126,000 -204,000 -15,000 -286,000 -149,000 -90,000 -383,000 -536,000 -506,000 -856,000 -839,000 -1,136,000 -184,000 -660,000 -237,000 -349,000 -35,000 -60,000 -80,000 -78,000 -681,000 -645,000 -650,000 -1,139,000 -1,953,000 -1,437,000 -2,122,000 -3,216,000 -1,001,000 
          proceeds from maturities of available-for-sale securities
        128,380,000  38,000,000 31,000,000 38,000,000  74,500,000 15,300,000 45,000,000                         
          purchases of available-for-sale securities
        -83,457,000 -23,921,000 -83,188,000 -63,440,000 -65,337,000 -15,329,000 -85,472,000 -20,190,000 -83,346,000 -14,614,000 -34,252,000   -19,612,000 -50,462,000 -103,807,000 -8,881,000 -16,678,000 -76,203,000     -8,937,000 -7,143,000 -15,416,000  -5,420,000 -4,205,000 -9,119,000 
          net cash from investing activities
        44,758,000 47,014,000 -45,273,000 -32,732,000 -27,463,000 38,567,000 -10,987,000 -5,176,000 -38,490,000 45,296,000 -24,635,000   66,100,000 14,909,000 -59,595,000 37,743,000 30,176,000 -72,510,000 -48,717,000 -35,000 -60,000 -80,000 322,000 6,418,000 2,855,000 3,963,000 24,143,000 -6,445,000 -21,264,000 -1,397,000 -2,490,000 -1,611,000 
          cash flows from financing activities:
                                         
          proceeds from issuance of common stock and pre-funded warrants in public offering, net of underwriting discounts and commissions
         189,637,000                             
          payments of common stock and pre-funded warrants issuance costs in public offering
         -1,661,000 -20,000                             
          proceeds from issuance of common stock and pre-funded warrants in private placement
        239,972,000     -1,000 108,859,000                         
          payments of common stock and pre-funded warrants issuance costs in private placement
        -12,890,000                               
          proceeds from issuance of common stock in at-the-market public offering, net of sales commissions
        11,927,000 5,117,000 1,419,000 246,000                             
          proceeds from exercises of common stock options
        18,000    278,000 9,000 151,000                         
          payments of principal portion of finance lease obligations
         -203,000 -243,000 -142,000 -135,000 -128,000 -120,000                           
          net cash from financing activities
        239,027,000 5,143,000 1,176,000 -1,601,000 189,728,000 6,940,000 3,256,000 5,000,000 107,241,000 505,000   74,737,000 -1,000 73,000 22,000 66,000 3,000 -238,000 135,154,000     -287,000    -13,000 -193,000 131,713,000 
          net increase in cash, cash equivalents, and restricted cash
        236,555,000   -71,745,000 130,415,000   -21,643,000 43,559,000                         
          cash, cash equivalents, and restricted cash at beginning of period
        61,890,000 82,187,000 75,848,000 157,217,000 121,206,000 155,071,000 76,370,000 86,693,000   
          cash, cash equivalents, and restricted cash at end of period
        298,445,000 -1,398,000 -77,569,000 -71,745,000 212,602,000 15,862,000 -31,439,000 -21,643,000 119,407,000 24,978,000 -42,532,000 -73,080,000 166,482,000 106,357,000 -5,521,000 -75,400,000 131,781,000 9,368,000 -90,931,000 -66,055,000 268,824,000 129,947,000 -15,644,000 -12,746,000 53,514,000 -18,677,000 42,884,000 -2,158,000 54,321,000 -42,681,000 -16,687,000 -19,014,000 165,075,000 
          non-cash acquired in-process research and development
                                        
          common stock issued as upfront payment for collaboration and license agreement
                                         
          proceeds from sale of property and equipment
                                        
          proceeds from sales and maturities of available-for-sale securities
                                         
          employee stock purchase plan purchases
         229,000   192,000                           
          net increase in cash, cash equivalents and restricted cash
                    9,265,000 106,357,000 -5,521,000 -75,400,000 10,575,000   -66,055,000 113,753,000 129,947,000    -18,677,000 42,884,000 -2,158,000 -32,372,000 -42,681,000 -16,687,000 -19,014,000 112,930,000 
          operating lease liabilities
          -443,000 -432,000 -416,000  -398,000                           
          net decrease in cash, cash equivalents, and restricted cash
                                         
          operating activities:
                                         
          net amortization of discount on available-for-sale securities
                                         
          common stock issued as up-front payment for collaboration and license agreement
                                         
          prepaid expenses and other current and non-current assets
                 124,000 2,350,000 -299,000 1,261,000 394,000 2,715,000 3,952,000 -3,366,000 -7,608,000 -2,260,000 1,390,000 -769,000 -1,420,000 1,088,000 1,567,000 -1,205,000  3,195,000 -3,594,000 -707,000  -1,348,000 217,000 -641,000 
          accrued expenses and other current and non-current liabilities
                 -2,119,000 433,000 -2,412,000 -4,911,000 2,569,000 -4,966,000 8,674,000 -445,000 2,576,000 -302,000 -613,000 -3,916,000 887,000 -226,000 -643,000 -1,175,000  5,101,000 -1,435,000 -1,252,000  990,000 546,000 -1,351,000 
          investing activities:
                                         
          financing activities:
                                         
          proceeds from issuance of common stock in public offering, net of sales commissions
             6,857,000 3,098,000 5,358,000 3,056,000                         
          proceeds from exercise of stock options
                          3,000 9,000 29,000             
          depreciation, impairment, and amortization expense
              405,000 1,235,000 327,000                         
          supplemental disclosure of cash flow information:
                                         
          cash paid for interest
              -82,000                           
          supplemental disclosure of non-cash investing and operating activities:
                                         
          right-of-use assets acquired through operating leases
              -10,000 417,000                         
          decrease in right-of-use assets due to lease termination
              -64,000 -197,000                         
          decrease in property and equipment due to asset exchange
                                         
          property and equipment purchases included in accounts payable and accrued expenses
              16,000 20,000                         
          gain on termination of lease
                -89,000                        
          payments of common stock issuance costs
                -4,825,000                         
          supplemental disclosure of non-cash investing and financing activities:
                                         
          net amortization of (discount)/premium on available-for-sale securities
                                         
          loss on sale of property and equipment
                                    7,000 -9,000   
          gain on lease termination
                                         
          gain on acquisition
                                         
          accounts receivable - related party
                     14,000 96,000 484,000 -308,000 -6,000 -280,000             
          deferred revenue - related party, current and non-current
                                         
          acquisition of business, net of cash received
                                         
          proceeds from issuance of common stock, net of issuance costs
                 435,000                      
          proceeds from financing liabilities
                                         
          proceeds from exercise of pre-funded warrants
                                         
          employee stock purchases and withholdings
                                         
          repayment of financing liabilities
                                         
          issuance of common stock in acquisition
                                         
          right-of-use assets obtained in exchange for operating lease liabilities
                 -18,000 11,000                     
          decrease in right-of-use asset and lease liability due to lease termination
                                         
          decrease in property, plant and equipment due to asset exchange
                                         
          property and equipment included in accounts payable and accruals
                     310,000 -383,000 336,000 264,000 -241,000 298,000 37,000 10,000   -28,000 55,000 439,000 -344,000 -648,000 1,043,000 439,000 -202,000   
          amortization of (discount) premium on available-for-sale securities
                  -984,000 -58,000 -215,000                     
          depreciation and impairment expense
                  588,000 703,000 1,077,000                     
          deferred revenue- related party, current and non-current
                      -6,170,000 -1,910,000  -3,229,000 -3,309,000 -3,055,000             
          proceeds from the sale of property and equipment
                                         
          proceeds from sale and maturities of available-for-sale securities
                  10,000,000 20,866,000 37,766,000  65,610,000 45,348,000 46,808,000      400,000 7,500,000  13,550,000 32,425,000 10,924,000  6,145,000 4,931,000 8,509,000 
          proceeds from exercise of warrants
                      22,000                 
          employee stock purchases and withholding
                     -1,000                   
          net decrease in cash, cash equivalents and restricted cash
                  -42,532,000             -12,746,000 -22,856,000         
          decrease in right-of-use asset due to lease termination
                                       
          decrease in property plant and equipment due to asset exchange
                                        
          net cash provided in investing activities
                    37,260,000                     
          net amortization of premium/(discount) on available-for-sale securities
                                         
          proceeds from the issuance of common stock to a related party in connection with the stock purchase agreement
                                         
          payment of offering costs
                                 -287,000        
          proceeds for exercise of stock options
                                         
          decrease in right-of-use assets and lease liability due to lease termination
                                         
          amortization of premium on available-for-sale securities
                      -17,000 155,000 371,000                5,000 
          depreciation expense
                      438,000 722,000 709,000  751,000 719,000 734,000 796,000 766,000 1,334,000 1,026,000 806,000 764,000 658,000 596,000 481,000 545,000 313,000 227,000 
          loss on disposal of property and equipment
                                         
          offering costs in accruals
                            247,000             
          proceeds from issuance of pre-funded warrants
                                         
          decrease in rou asset and lease liability due to lease termination
                                         
          amortization of (discount)/premium on available-for-sale securities
                          528,000   1,000 -21,000 -33,000 -11,000 -87,000 -148,000 -38,000 -18,000   
          gain on disposal of property and equipment
                          6,000 3,000             
          change in unrealized loss
                          -11,000               
          decrease in right of use asset due to lease termination
                                        
          proceeds from issuance of common stock
                           -247,000 135,125,000            
          proceeds from landlord lease incentive for tenant improvements
                                        
          proceeds from initial public offering of common stock, net of commissions and underwriting discounts
                                     133,688,000 
          principal payments under capital lease obligation
                                         
          conversion of series a, b, c and d common units into shares of common stock
                                     65,180,000 
          conversion of series 2 senior preferred units into shares of common stock
                                     55,002,000 
          conversion of series 1 senior preferred units into shares of common stock
                                     25,000,000 
          conversion of junior preferred units into shares of common stock
                                     44,177,000 
          property and equipment acquired through a capital lease
                                         
          proceeds from issuance of warrants
                                         
          operating lease liabilities arising from obtaining right-of-use asset
                                  1,629,000     
          offering costs included in accounts payable and accruals
                                         
          purchases of marketable investments
                                -401,000         
          (gain) from revaluation of preferred unit tranche right
                                         
          prepaid expenses and other current assets
                                         
          accrued expenses and other current liabilities
                                         
          proceeds from issuance of series 1 senior preferred units
                                         
          proceeds from issuance of series 2 senior preferred units
                                         
          accretion to redemption value for redeemable preferred units
                                         
          redemption of preferred units
                                         
          redemption of redeemable interest from non-controlling interest in solid gt
                                         
          deferred offering costs included in accounts payable and accrued expenses
                                         
          issuance of series d common units in exchange for series a common units
                                         
          issuance of series a common units in exchange for redeemable preferred units
                                         
          issuance of junior preferred units upon redemption of class d non-controlling interest in solid gt
                                         
          issuance of series c common units in exchange for class b non-controlling interest in solid gt
                                         
          issuance of series d common units in exchange for class c non-controlling interest in solid gt
                                         
          payment of deferred offering costs
                                     -193,000 -1,975,000 
          deferred offering costs included in accounts payable
                                        193,000 
          loss from revaluation of preferred unit tranche right
                                         
          proceeds from sales and maturities of available for sale securities
                                         
          purchases of available for sale securities
                                         
          proceeds from issuance of redeemable preferred units
                                         
          reclassification of preferred unit tranche liability to preferred units upon settlement
                                         
          decretion (accretion) to redemption value for redeemable preferred units
                                         
          revaluation of tranche liability
                                         
          deferred offering costs included in accounts payable and accruals
                                         
          cash, cash equivalents and restricted cash at beginning of period
                                        52,145,000 
          offering costs included in accounts payable
                                         
          property and equipment included in accounts payable
                                        1,479,000 
          amortization of premium on available for sale securities
                                         
          changes in restricted cash
                                         
          proceeds from issuance of non-controlling interest in solid gt
                                         
          net increase in cash and cash equivalents
                                         
          cash and cash equivalents at beginning of period
                                         
          cash and cash equivalents at end of period