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Unit: USD	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	2021-03-31	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	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2009-12-31	2009-09-30	2009-06-30	2009-03-31	2008-12-31	2008-09-30	2008-06-30	2008-03-31	2007-12-31	2007-09-30	2007-06-30	2006-12-31	2006-09-30	2006-06-30	2005-12-31	2005-09-30	2005-06-30	2004-12-31	2004-09-30	2004-06-30	2003-12-31	2003-09-30	2003-06-30

cash flows from operating activities:
net income	-1,649,000	-2,485,000	-5,398,000	-6,870,000	-9,581,000	-9,880,000	-8,710,000	-5,032,000	-4,324,000	-7,616,000	-7,933,000	-3,712,000	-3,417,000	-5,887,000	-6,845,000	-825,000	-3,539,000	-8,353,000	17,293,000	22,558,000	-4,737,000	-5,994,000	-4,249,000	-7,281,000	-15,252,000	-6,925,000	-2,768,000	-7,325,000	-10,355,000										-8,418,000	-14,622,000	-10,513,000	-19,771,000	-20,136,000	-15,949,000	-10,275,000	-21,167,000	-26,272,000	-51,709,000	-37,679,000	-221,445,000	16,004,000	9,987,000	9,170,000	5,179,000	4,340,000	1,792,000	1,308,000	-7,772,000	-4,068,000	-6,103,000	-1,812,000	-7,309,000	-6,673,000	-9,653,000	-9,546,299	-6,976,351	-6,723,444	-7,451,919	-6,758,795	-5,638,436	-2,463,711	-4,083,681	-4,946,168	-6,518,712	-7,336,256	-8,356,476
adjustments to reconcile net income to net cash from operations:
depreciation and amortization	1,126,000	1,115,000	1,119,000	1,257,000	1,305,000	1,398,000	1,401,000	1,332,000	1,378,000	1,541,000	1,802,000	1,009,000	1,000,000	996,000	1,050,000	1,113,000	1,149,000	1,154,000	1,148,000	1,157,000	1,150,000	2,220,000	1,557,000	3,337,000	4,345,000	1,913,000	1,871,000	1,864,000	1,871,000	1,922,000	2,041,000	1,981,000	2,028,000	2,256,000	2,397,000	2,426,000	2,475,000	2,563,000	2,709,000	2,688,000	2,655,000	2,911,000	3,515,000	3,284,000	3,344,000	4,580,000	4,205,000	3,428,000	3,242,000	3,328,000	2,544,000	2,774,000	2,654,000	2,454,000	2,403,000	2,301,000	2,211,000	2,058,000	2,010,000	2,124,000	1,926,000	2,908,000	2,951,000	2,310,000	993,812	996,154	1,068,020	1,817,891	1,982,682	1,948,092	1,931,292	1,932,407	1,951,694	1,773,005	1,993,062	1,615,976
stock-based compensation expense	1,140,000	1,111,000	1,357,000	1,237,000	1,440,000	1,019,000	1,033,000	1,148,000	1,120,000	888,000	839,000	849,000	909,000	686,000	590,000	397,000	249,000	628,000	792,000	825,000	785,000	577,000	883,000	478,000	754,000	626,000	613,000	654,000	999,000	706,000	708,000	706,000	1,128,000	1,316,000	1,521,000	1,518,000	1,581,000	3,368,000	3,041,000	2,152,000	2,135,000	2,170,000	1,929,000	2,045,000	1,994,000	2,167,000	2,118,000	2,113,000	3,466,000	2,143,000	3,444,000	4,326,000	3,499,000	3,522,000	3,852,000	3,066,000	2,086,000	2,392,000	2,895,000	2,299,000	1,307,000	1,335,000	1,946,000	1,077,000	919,997	1,018,699	780,238
benefit from excess and obsolete inventory	466,000	686,000	384,000	220,000	232,000	669,000	346,000	275,000	424,000	152,000	360,000	461,000	789,000	785,000	295,000	107,000	89,000	192,000	172,000	370,000	144,000	19,000	64,000	101,000	250,000	541,000	403,000	399,000	272,000	878,000	1,006,000	227,000	602,000	-15,000	116,000	636,000	649,000	29,000	95,000	32,000	160,000	1,273,000	536,000	171,000	250,000	2,207,000	647,000	1,090,000	413,000
deferred income taxes			-1,000	-41,000	2,000	2,000	61,000	-267,000	1,000	607,000				-645,000																																				3,922,000	-191,000	-2,098,000	2,027,000	-497,000	-404,000	-707,000		-189,000	-684,000	1,300,000
change in fair value of contingent consideration	852,000	850,000	1,350,000	410,000	-220,000	-290,000	170,000	-1,410,000	-2,110,000	320,000
china dissolution				0	0
other non-cash items	222,000	105,000	168,000	415,000	319,000	-7,000	-127,000	118,000	210,000	-19,000	58,000	131,000	102,000	351,000	866,000	-988,000	100,000	1,575,000	-965,000	-333,000	-394,000	712,000	178,000	-815,000	718,000	-3,000	-834,000	204,000	-307,000	768,000	-227,000	368,000	553,000				93,000	632,000	289,000	206,000	686,000	637,000	1,440,000	150,000	200,000	-1,456,000	435,000	965,000	827,000	343,000	895,000	787,000	320,000	363,000	175,000	207,000	-1,292,000	851,000	840,000	427,000	482,000	195,000	12,000	8,000
unrealized foreign exchange loss on cash and cash equivalents					0				-119,000			187,000	85,000
changes in operating asset and liability accounts:
accounts receivable	2,793,000	2,603,000	549,000	-13,098,000	2,830,000	1,334,000	-1,426,000	768,000	4,129,000	-1,183,000	6,219,000	-8,626,000	8,783,000	-498,000	-6,417,000	630,000	-2,874,000	195,000	-445,000	3,913,000	-4,192,000	4,721,000	-3,700,000	-195,000	319,000	7,930,000	-3,905,000	-5,074,000	12,192,000				1,414,000					965,000	-290,000	2,593,000	8,111,000	-6,836,000	3,229,000	-1,276,000	4,132,000	-3,558,000	2,447,000	-4,379,000	670,000	132,884,000	-32,756,000	-1,105,000	-35,848,000	-36,045,000	16,078,000	-13,068,000	-13,110,000	-10,572,000	946,000	3,891,000	-11,297,000	-3,786,000	-2,553,000	-2,694,000	5,073,313	-461,503	-6,972,955	-913,534	1,032,753	-552,040	-3,256,002	1,512,181	2,143,759	-843,207	353,337	-1,312,676
inventory	3,198,000	-5,663,000	-6,272,000	1,528,000	-2,575,000	-4,116,000	-9,633,000	-3,028,000	196,000	687,000	3,828,000	2,459,000	1,132,000	-1,175,000	-3,379,000	-3,697,000	108,000	1,687,000	2,042,000	1,737,000	-459,000	-2,603,000	-1,174,000	-365,000	1,719,000	1,479,000	6,402,000	2,054,000	-10,750,000	-4,070,000	-190,000	510,000	2,968,000				623,000	4,361,000	-633,000	6,454,000	2,861,000	1,716,000	-7,202,000	-1,107,000	136,000	2,891,000	-3,619,000	-1,476,000	-5,324,000	-47,496,000	4,488,000	-3,280,000	-5,654,000	-6,963,000	2,332,000	3,903,000	-12,851,000	-6,769,000	-3,636,000	-1,126,000	-2,748,000	330,000	-1,813,000	-179,000	235,585	-2,207,507	1,190,512	1,654,569
prepaid expenses and other assets	-1,239,000	1,477,000	6,901,000		-376,000	-369,000	580,000		-1,436,000		872,000	-370,000	-496,000		1,478,000	-808,000	-1,002,000
accounts payable and accrued expenses	-6,096,000	-43,000	-9,720,000	6,095,000	-4,320,000	542,000	6,343,000	4,931,000	-3,711,000	2,847,000	-4,702,000	4,782,000	-7,974,000	3,246,000	-151,000	2,980,000	-181,000	-1,764,000	2,437,000	2,091,000	75,000	-3,594,000	1,408,000	-366,000	-404,000	-3,907,000	450,000	-6,131,000	1,650,000					-115,000	1,540,000				493,000	-3,641,000	-5,464,000	-1,534,000	-5,430,000	-8,451,000	-6,449,000	-594,000	-25,921,000	-17,901,000	-19,732,000	-9,838,000	1,605,000	10,151,000	-2,140,000	8,135,000	5,366,000	-10,176,000	17,608,000	10,646,000	846,000	-1,890,000	11,951,000	1,512,000	2,894,000	-4,722,000	1,946,002	-422,314	1,206,547	1,396,409	-2,121,279	71,986	591,226	1,103,851	-2,042,632	2,273,263	1,033,245	292,961
deferred revenue	436,000	1,140,000	7,318,000	9,244,000	5,449,000	2,071,000	4,099,000	-1,314,000	100,000	-2,802,000	-619,000	-742,000	-3,894,000	3,136,000	6,941,000	-2,382,000	3,093,000	-2,412,000	232,000	-1,259,000	666,000	-1,026,000	-2,097,000	-2,065,000	3,300,000	-2,172,000	-899,000	4,418,000	79,000	7,050,000				-4,144,000	-2,017,000	4,575,000	5,851,000		-1,702,000	-8,662,000	-10,211,000	5,991,000	6,222,000	1,677,000	-3,913,000	3,806,000	1,445,000	725,000	3,084,000	-27,840,000	-1,378,000	-253,000	8,073,000	4,449,000	773,000	-1,340,000	6,242,000	4,670,000	2,122,000	1,731,000	3,993,000	-1,446,000	1,181,000	3,247,000	-585,074	8,105	1,660,702	650,927
net cash from operating activities	1,251,000	897,000	-2,245,000	-5,418,000	-5,495,000	-5,709,000	-5,863,000	-3,052,000	-4,191,000	-3,810,000	1,682,000	-3,438,000	-3,115,000				-5,866,000				-6,886,000	-4,593,000	-6,695,000	-8,109,000	-5,430,000	-680,000	377,000	-8,852,000	-2,060,000										-3,587,000	-5,472,000	-9,307,000	-4,580,000				-7,768,000	-26,378,000	-49,122,000	-57,774,000	-6,485,000	-14,458,000	16,601,000	-18,479,000	-22,824,000	35,823,000	-14,136,000	-1,584,000	-4,362,000	337,000	3,183,000	-322,000	-6,040,000	-3,197,000	-8,264,000	-1,264,883	-7,632,209	-7,840,702	-3,247,512	-6,162,807	-6,440,041	-830,254	-3,500,589	-2,519,119	-2,367,810	-3,552,140	-6,964,107
capex	-205,000	-216,000	-214,000	-266,000	-410,000	-119,000	-441,000	-228,000	-200,000	-190,000	-248,000	-689,000	-637,000				-836,000				-115,000	-409,000	-1,642,000	-407,000	-76,000	-99,000	-198,000	-78,000	-281,000										-108,000	-18,000	-97,000	-171,000				-1,563,000	-2,029,000	-2,805,000	-4,498,000	-10,238,000	-12,674,000	-9,765,000	-8,185,000	-5,491,000	-1,081,000	-1,660,000	-1,285,000	-1,944,000	-1,779,000	-1,526,000	-2,277,000	-2,810,000	-2,032,000	-1,479,000	-3,326,832	-1,818,733	-2,781,153	-283,602	-576,701	-211,295	-325,600	-240,766	-650,697	0	-216,783	-889,799
free cash flows	1,046,000	681,000	-2,459,000	-5,684,000	-5,905,000	-5,828,000	-6,304,000	-3,280,000	-4,391,000	-4,000,000	1,434,000	-4,127,000	-3,752,000				-6,702,000				-7,001,000	-5,002,000	-8,337,000	-8,516,000	-5,506,000	-779,000	179,000	-8,930,000	-2,341,000										-3,695,000	-5,490,000	-9,404,000	-4,751,000				-9,331,000	-28,407,000	-51,927,000	-62,272,000	-16,723,000	-27,132,000	6,836,000	-26,664,000	-28,315,000	34,742,000	-15,796,000	-2,869,000	-6,306,000	-1,442,000	1,657,000	-2,599,000	-8,850,000	-5,229,000	-9,743,000	-4,591,715	-9,450,942	-10,621,855	-3,531,114	-6,739,508	-6,651,336	-1,155,854	-3,741,355	-3,169,816	-2,367,810	-3,768,923	-7,853,906
cash flows from investing activities:
purchase of property, plant and equipment	-205,000	-216,000	-214,000	-266,000	-410,000	-119,000	-441,000	-228,000	-200,000	-190,000	-248,000	-689,000	-637,000	-704,000	-1,190,000	-900,000	-836,000	-243,000	-291,000	-303,000	-115,000	-409,000	-1,642,000	-407,000	-76,000	-99,000	-198,000	-78,000	-281,000										-108,000	-18,000	-97,000	-171,000	-356,000	-815,000	-88,000	-1,563,000	-2,029,000	-2,805,000	-4,498,000	-10,238,000	-12,674,000	-9,765,000	-8,185,000	-5,491,000	-1,081,000	-1,660,000	-1,285,000	-1,944,000	-1,779,000	-1,526,000	-2,277,000	-2,810,000	-2,032,000	-1,479,000	-3,326,832	-1,818,733	-2,781,153	-283,602	-576,701	-211,295	-325,600	-240,766	-650,697
change in other assets	2,000	69,000	-79,000	-87,000	-95,000	-44,000	-55,000	121,000	-26,000	87,000	-69,000	-65,000	128,000	-29,000	-29,000	-28,000	94,000	62,000	-75,000	-80,000	-51,000	-41,000	156,000	-107,000	-23,000	-54,000	145,000	-7,000	-21,000	-5,000	180,000	-39,000	130,000	-36,000					386,000	-290,000	-205,000					520,000	-95,000	-444,000	-195,000	1,225,000	93,000	-171,000	-11,000	-262,000	-190,000	-427,000				-30,000	27,000	-12,000
net cash from investing activities	-203,000	-147,000	-293,000	-353,000	-505,000	-163,000	-496,000	-107,000		5,042,000				-1,733,000	-26,219,000						-166,000					-165,000	725,000	-97,000	-271,000	17,000				-2,546,000	2,091,000			-389,000	955,000	-331,000	3,774,000	2,662,000	9,626,000	1,911,000	-6,846,000	-4,984,000	-7,907,000	16,475,000	59,753,000	-39,774,000	-27,764,000	-37,254,000	-41,000	-24,378,000	-19,618,000	7,712,000	18,174,000	4,088,000	-13,337,000	-12,415,000	-5,104,000	-15,891,000	-20,963,000	1,498,000	893,322	7,135,644	-14,747,008	-10,065,204	4,013,416	13,392,649	-174,829	6,323,965	-6,394,825	-753,684	-395,783	-546,887
cash flows from financing activities:
repayment of debt	-16,000	-16,000	-17,000	-17,000	-23,000	-13,000	-20,000	-23,000	-12,000													0	0	0	-1,575,000	0	-1,167,000	-1,000,000	-1,000,000										-1,154,000	-1,154,000	-1,154,000	-1,154,000
proceeds from exercise of employee stock options and espp	0			108,000	-1,000			116,000	0	179,000	0			102,000	0			86,000	0			90,000	0							0	0			64,000	0			69,000	0			113,000	0			178,000	0	129,000	21,000	468,000	5,776,000	1,013,000	561,000
net cash from financing activities	-16,000	120,000	-17,000	91,000	-24,000	115,000	-20,000	93,000		179,000	51,220,000	-195,000	-376,000			-122,000	-283,000													-1,000,000	-1,000,000	-981,000	21,183,000	-964,000	8,903,000			3,046,000	12,016,000			-1,041,000	1,019,000	-1,682,000	32,925,000	178,000	0	-4,497,000	4,376,000	468,000	161,016,000	1,013,000	561,000	1,980,000	2,574,000	1,494,000	233,000	233,000	1,084,000	10,913,000	852,000	5,618,000	95,991,000	5,971,000	212,052	429,837	490,669	287,422	39,643	635,702	1,082,663	200,234	1,004,607	51,628,259	632,884	112,507
effect of exchange rate changes on cash	13,000	-12,000	2,000		21,000	21,000	-17,000		-4,000		20,000	41,000	12,000		104,000	-433,000	359,000		-18,000	-730,000	-44,000
net decrease in cash, cash equivalents and restricted cash	1,045,000	858,000	-2,553,000	-5,676,000	-6,003,000	-5,736,000	-6,396,000						-3,988,000				-3,531,000
cash, cash equivalents and restricted cash at beginning of period	0	0	25,675,000		0	0	49,486,000		0		0	0	30,864,000		0	0	78,198,000		-1,000	0	34,249,000
cash, cash equivalents and restricted cash at end of period	1,045,000	858,000	23,122,000		-6,003,000	-5,736,000	43,090,000		-4,433,000		26,606,000	20,660,000	26,876,000		-27,330,000	-16,102,000	74,667,000		23,873,000	29,419,000	26,915,000
supplemental schedule of cash flow information:
cash paid for income taxes, net of refunds	92,000	90,000	81,000	70,000	128,000	103,000	49,000	86,000	139,000	-36,000	355,000	50,000	225,000	133,000	3,390,000	2,000	128,000	67,000	1,354,000	1,262,000	176,000	564,000	259,000	657,000	96,000	72,000	26,000	782,000	112,000	603,000	362,000	429,000	329,000	0	136,000	192,000	34,000				145,000	393,000	48,000	76,000	-828,000	-125,000
non-cash investing and financing activities
issuance of common stock to settle contingent consideration
issuance of common stock to settle liabilities	154,000	150,000	163,000	147,000	159,000	179,000	138,000	118,000	114,000	124,000	82,000	101,000	88,000	165,000	69,000	92,000	81,000	222,000	63,000	87,000	85,000	98,000	67,000	95,000	90,000	110,000	77,000	105,000	107,000	91,000	89,000	90,000	107,000	92,000	95,000	97,000	1,431,000	16,476,000	100,000	5,999,000	1,832,000	8,490,000	7,730,000	1,660,000	1,016,000
non-cash interest income								0		-46,000			-134,000	-308,000	112,000	0	-112,000	-56,000	-56,000
unrealized foreign exchange gain on cash and cash equivalents
prepaid expenses and other current assets																		1,015,000	-808,000	-240,000	-332,000	-89,000	562,000	358,000	-273,000	446,000	-560,000	1,288,000	1,555,000	-192,000	2,843,000	2,686,000	271,000				441,000	9,050,000	-69,000	4,682,000	-1,151,000	4,188,000	-3,695,000	7,546,000	848,000	-1,559,000	15,773,000	-4,717,000	-7,812,000	453,000	-9,473,000	-4,792,000	-1,616,000	-3,690,000	199,000	513,000	-4,844,000	347,000	164,000	-1,944,000	-494,000	-853,000	-1,154,000	-352,000	-215,835	237,255	-68,526	-427,881	152,831	169,881	-421,579	254,675	-83,944	2,984	-35,431	-29,874
cash paid for acquisition, net of cash received
proceeds from the maturity of marketable securities								0	0																																	-21,000	5,213,000	-16,000	100,000					57,679,000	31,669,000	-8,707,000	24,189,000	7,264,000	10,366,000	23,008,000	31,525,000	22,401,000	13,077,000	21,602,000	5,542,000	27,348,000	106,985,000	16,042,000
repurchase of treasury stock								0	0			-294,000	-376,000
effect of exchange rate changes on cash, cash equivalents and restricted cash
cash, cash equivalents and restricted cash at beginning of year
cash, cash equivalents and restricted cash at end of year
issuance of common stock in connection with the purchase of neeltran, inc.								0
cash paid for acquisition, net of cash acquired									0														-60,000
unrealized foreign exchange loss/(gain) on cash and cash equivalents										-3,000
sale of marketable securities										5,146,000	0
proceeds from public equity offering										0												0	0	-2,000	16,954,000					0	1,000	0	22,281,000					4,126,000
net increase in cash, cash equivalents and restricted cash																		-2,010,000	23,874,000
issuance of common stock in connection with the purchase of northeast power systems, inc
net increase/(decrease) in cash, cash equivalents and restricted cash									-4,433,000		26,606,000										-7,334,000
issuance of common stock in connection with the purchase of northeast power systems, inc.
net cash (used)/provided by investing activities
net cash provided/(used) by financing activities
change in fair value of warrants														0	-556,000	-1,146,000	-2,946,000			-282,000	464,000
proceeds from the sale of property, plant and equipment														0	0	0	3,001,000	3,000,000	0			16,892,000	6,000	2,000	10,000	14,000	0	0	15,000	17,000	23,000	0	7,000	-2,000	12,000	3,000	5,000	-6,000			25,000																0	0			178,000	792,000			-1,000	5,000	47,500	4,500	6,435	12,500	14,000	0	55,500
purchase of marketable securities														0	-25,000,000																																			-86,161,000	-46,461,000	-10,222,000	-15,061,000	-27,563,000	-28,092,000	-12,441,000	-11,974,000	-15,385,000	-30,569,000	-31,648,000	-7,388,000	-32,710,000	-122,575,000	-11,977,000	-16,874,605	-23,673,450	-17,865,864	-27,161,122	-25,931,038	-22,506,294	-8,912,946	-5,553,764	-12,714,445
purchase of intangible assets																																														-334,000	-3,125,000	-528,000	-240,000	-511,000	-388,000	-385,000	-1,230,000	-517,000	-474,000	-369,000	-275,000	-233,000	-237,000	-375,000	-515,000	-310,000	-110,000	-329,000
employee taxes paid related to net settlement of equity awards										0				0	-60,000	-222,000	-283,000	0	-60,000	-158,000	-238,000	0	0	0	-274,000	0	0	-29,000	-461,000										0	0	-57,000	0	-6,000	0	-36,000
proceeds from exercise of warrants														0
issuance of common stock to hercules to settle warrant liability														0	0	0	294,000
cash paid for acquisition
net cash (used in)/provided by investing activities												24,252,000	-509,000
gain on sale from minority interest investments
proceeds from sale of minority interests
adjustments to reconcile net income to net cash (used in)/provided by operations:
gain on sale of minority interest																							0
unrealized foreign exchange (gain)/loss on cash and cash equivalents
net cash (used in)/provided by operating activities															-7,294,000
proceeds from sale of minority interest																							0
net cash (used in)/provided by financing activities																											-1,167,000
net (decrease)/increase in cash, cash equivalents and restricted cash															-27,330,000
net cash provided by/(used in) investing activities																	2,259,000		-239,000					673,000	606,000
recovery of prepaid taxes
change in fair value of warrants and contingent consideration																		1,067,000				762,000	-127,000
issuance of common stock in connection with the purchase of infinia technology corporation																						0	-59,000
deferred gain on sale of 64 jackson road building
cash paid for interest																						0	0	0	42,000	42,000	51,000	79,000	108,000	135,000	183,000	171,000	220,000	425,000	253,000	316,000	368,000	391,000	199,000	184,000	216,000
(gain) on sale of minority interest
net cash provided by/(used in) operating activities																			24,191,000
net cash provided by/(used in) financing activities																			-60,000	-87,000	-238,000		0	83,000	15,105,000
non-cash interest expense																					-56,000	0	0	0	19,000	29,000	29,000	42,000	56,000	69,000	83,000	96,000	111,000	76,000	147,000	153,000	190,000	1,811,000	1,137,000	3,093,000	1,672,000	4,022,000	3,961,000	2,161,000	2,282,000
impairment of minority interest investments
(recovery)/write-off prepaid taxes
income from minority interest investments
change in restricted cash																						0	0	100,000	695,000	-26,000	453,000	-12,000	16,000	-163,000				-2,452,000	1,918,000	2,674,000	108,000	-1,000	617,000	2,000	4,051,000	3,025,000	4,769,000			-3,057,000	-2,255,000	-18,000	-3,763,000	-3,000	-3,000	-4,000	257,000	2,191,000	-147,000	-399,000	669,000
proceeds from atm sales																																			1,014,000	3,648,000	1,177,000
effect of exchange rate changes on cash and cash equivalents																						-184,000	28,000	196,000	412,000	39,000	-134,000	29,000	-327,000									-36,000	143,000	117,000	109,000	-255,000	196,000	0	-280,000	248,000	-621,000	-230,000	747,000	553,000	-2,388,000	7,411,000	-4,791,000	-1,147,000	1,190,000	1,039,000	-1,737,000	-165,000	-1,860,000	55,000	1,077,000	505,000	166,000	12,000
net increase/(decrease) in cash and cash equivalents																								-7,157,000	10,693,000					2,893,000	3,865,000	-5,989,000	18,071,000
cash and cash equivalents at beginning of year																						0	0	0	26,784,000	0	0			0	0	0	20,490,000	0	0	0	43,114,000	0	0
cash and cash equivalents at end of year																						11,971,000	-8,207,000	-7,157,000	37,477,000	1,721,000	-199,000			2,893,000	3,865,000	-5,989,000	38,561,000	-15,493,000	1,304,000	-1,945,000	36,624,000	7,720,000
net decrease in cash and cash equivalents																																																					-22,750,000											-783,000								3,023,610	-7,909,337
change in fair value of derivatives and warrants																									-925,000	-637,000	-100,000	-1,245,000	678,000								35,000		-535,000	-886,000	-469,000	-1,442,000	-7,011,000	-1,491,000	2,388,000
write-off prepaid taxes																														0	-222,000	-309,000	820,000
reversal of catlin legal costs
proceeds from the issuance of debt, net of expenses																																		-7,000				4,000				0	1,794,000	-1,860,000	32,961,000
net (decrease)/increase in cash and cash equivalents																										1,721,000	-199,000
impairment loss
gain from sale of minority interest investments
proceeds from the sale of minority interest
impairment of minority interest investment
income from minority interest investment
net cash (used in) / provided by financing activities																													-1,461,000
net (decrease) / increase in cash and cash equivalents																													-4,119,000
cash and cash equivalents at beginning of period																													39,330,000												39,243,000		0	0	46,279,000		0	0	123,783,000		0			0	0	70,674,000		0	0	67,834,000	0	0	0	15,925,000	0	0	35,171,181	0	0	38,592,032	0	0	31,241,237	0	0	18,487,752
cash and cash equivalents at end of period																													35,211,000											-6,741,000	32,608,000		-6,679,000	-11,351,000	60,487,000		-34,906,000	-37,374,000	130,885,000		116,406,000			-46,369,000	19,969,000	66,783,000		-206,000	-13,776,000	69,570,000	-3,497,000	-15,808,000	71,997,000	15,142,000	-159,509	-66,728	13,074,140	-13,025,294	-2,109,748	46,180,342	77,580	3,023,610	23,331,900	48,506,765	-3,315,039	11,089,265
loss on extinguishment of debt
(gain on sale)/income from minority interest investment
accrued arbitration liability																																			140,000
proceeds from sale of minority-interest
impairment of long-lived and intangible assets																																0	746,000	0	0							477,000
loss on minority interest investments																																0	356,000	99,000	234,000	208,000	202,000	219,000	290,000	251,000	248,000	317,000	424,000	678,000	812,000
adverse purchase commitment losses (recoveries)																																										660,000	-119,000	-1,008,000	-7,301,000	-1,372,000
prepaid vat reserve
proceeds from stock offering
non-cash portion of restructuring charges
write-off of advanced payment to the switch
patent costs
restructuring charges, net of payments																																						0	6,000	188,000	-27,000	641,000	310,000	-10,000	-39,000	77,000
purchase of minority investments																																														0	0	0	-1,800,000
advanced payment for planned acquisition
net increase in cash and cash equivalents																																								-6,741,000	-6,635,000			-11,351,000	14,208,000	-12,326,000			7,102,000	-45,238,000	116,406,000				19,969,000	-3,891,000	15,086,000	-206,000	-13,776,000	1,736,000	-3,497,000					-66,728	-22,097,041		-2,109,748	7,588,310
adverse purchase commitment recoveries
net cash (used by) provided by financing activities																																									-1,211,000
impairment of goodwill
benefit from doubtful accounts receivable
write-off of prepaid taxes
non-cash contingent consideration in connection with acquisitions																																																		1,000	0	5,999,000	4,004,000	0	7,547,000	3,281,000		1,224,000
adjustments to reconcile net (loss) to net cash (used in) operations:
cash paid for interest expense																																											274,000
net cash (used in) operating activities																																												-11,580,000	-11,591,000
increase in restricted cash																																													-6,858,000															-438,000	-671,000	-8,189,000	-3,638,000	-674,000
loss on minority interest investment
proceeds from debt
non-cash issuance of common stock																																														134,000	165,000	216,000	205,000	205,000	218,000	230,000	189,000	1,290,000	151,000	169,000		142,000
allowance for doubtful accounts																																																		-1,237,000	303,000	2,000	957,000	208,000	709,000	-657,000
write-off of advance payment																																															0
write-off of prepaid value added taxes
impairment of long-lived assets																																															1,911,000
proceeds from sales and maturities of marketable securities
advance payment for previously planned acquisition																																															0
payments in lieu of issuance of common stock for payroll taxes																																															0	0	-271,000
adverse purchase commitment losses
restructuring charges
proceeds from maturities of marketable securities																																																20,270,000	90,800,000
cash paid for income taxes																																																5,662,000	12,485,000	2,774,000	6,735,000	2,472,000	4,453,000
losses on purchase commitments																																																	1,071,000
advance payment for planned acquisition																																																	-20,551,000
net borrowings on line of credit																																																	4,626,000
stock-based compensation expense — non-employee
re-valuation of warrant																																																									1,000	0	-1,062,000	2,396,000	-830,000	1,226,000	270,000	986,000
stock-based compensation expense—non-employee																																																			57,000	102,000	79,000	61,000	0	30,000	-11,000	-24,000	-36,000	78,000	-10,000	115,000					33,075
purchase of minority investment																																																			0
proceeds from follow-on public offering, net of costs
cash and cash equivalents at beginning of the period																																																					87,594,000
cash and cash equivalents at end of the period																																																					64,844,000
adjustments to reconcile net income/(loss) to net cash from operations:
proceeds from exercise of employee stock options																																																						1,980,000	2,574,000	1,494,000	233,000	233,000	1,084,000	10,913,000
impairment charges on long-lived assets																																																													0	150,000	0	607,000
inventory write-down charges																																																													0	0	0	933,000
changes in operating asset and liability accounts, excluding the effect of acquisition:
acquisition costs, net of cash acquired in acquisitions
proceeds from follow-on public offering
issuance of common stock in connection with acquisitions
noncash issuance of common stock																																																												147,000								99,500	116,373	413,272	101,838	123,521	94,842	64,886	85,365	54,002
noncash contingent consideration in connection with acquisitions																																																												4,481,000
changes in operating asset and liability accounts, excluding the effect of acquisitions:
changes in other assets																																																										4,000
changes in restricted cash
proceeds from issuances of common stock																																																													846,000			5,971,000	212,052	429,837	490,669
change in deferred income taxes																																																														-417,000	-302,000	85,000
acquisition costs, net of cash acquired in acquisition of power quality systems, inc.																																																														0	0	-102,000
proceeds from secondary public offering																																																														-9,000
issuance of common stock in connection with the purchase of power quality systems, inc.																																																														0	0	4,349,000
proceeds from exercises of stock options
net change in cash and cash equivalents
stock-based compensation expense - non-employee																																																																83,000	59,042
decrease in other assets																																																																17,000
loss on disposal of pp&e and abandoned patents																																																																	16,069	19,015	18,924	75,501	11,087	40,692	4,604			-32,986
amortization of deferred warrant costs																																																																	1,505	1,505	1,505	1,505	1,505	1,505	1,505	1,505	4,441	13,323	13,324	13,322
gain on re-valuation of warrant
changes in operating asset and liability accounts :
proceeds from the sale of marketable securities																																																																	21,237,928	32,940,967	6,088,818		30,738,040	36,266,242	9,175,699	12,295,987	8,009,389
increase in other assets																																																																	-142,169	-318,140	-236,309	-157,983	-223,320	-168,504	-125,982	-177,492	-1,094,572	-969,088	-154,382	-236,901
loss on re-valuation of warrant
gain on revaluation of warrant																																																																			-35,300
amortization of deferred compensation expense																																																																				99,500	116,373	123,995	101,838	101,688	94,842	64,886	65,961	54,002
stock compensation expense																																																																				0	0	3,433	0			0
gain on valuation of warrant																																																																						-107,700
proceeds from the sale/maturity of marketable securities
expenses from secondary public offering
net proceeds from issuances of common stock																																																																				287,422	39,643	701,762
loss on valuation of warrant
additional expenses from secondary public offering																																																																					0	-66,060
inventory-current and long-term																																																																						-2,800,168	5,553,995	-5,007,122	-762,534	2,915,018
deferred revenue - current and long-term																																																																						298,719	-2,873,422			-2,015,384
net proceeds from issuance of common stock																																																																							1,082,663	200,234	1,004,607	51,628,259	632,884	112,507
gain on disposal of pp&e and abandoned patents																																																																									43,871
deferred revenue—current and long-term																																																																									1,077,552			-838,619
purchase of long-term marketable securities
proceeds from the sale of long-term marketable securities
purchase of property and equipment																																																																											-216,783	-889,799
proceeds from the sale of property and equipment																																																																											3,997	27,938
sale of long-term marketable securities																																																																											-28,615	551,875
gain on disposal of pp&e																																																																												-2,813
inventory—current and long-term																																																																												1,600,090
net cash decrease in cash and cash equivalents																																																																												-7,398,487

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