Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock
Balance at Mar. 31, 2009	$ 50,470	$ 175	$ 666,357	$ (615,100)	$ (962)
Balance, shares at Mar. 31, 2009		174,888,521			817,940
Increase (Decrease) in Stockholders' Equity
Purchase of treasury stock	(79)				(79)
Purchase of treasury stock, shares					78,169
Vested restricted stock awards		1	(1)
Vested restricted stock awards, shares		786,389
Stock-based compensation	4,560		4,560
Exercise of stock options and employee stock purchases	213		213
Exercise of stock options and employee stock purchases, shares		246,857
Stock awards to Board of Directors	66		66
Stock awards to Board of Directors, shares		57,532
Cumulative effect of adoption of new accounting pronouncement	(6,587)		(14,750)	8,163
Warrants exercised	15,018	7	15,012
Warrants exercised, shares		7,225,434
Issuance of common stock, net of issuance costs	48,214	58	48,155
Issuance of common stock, net of issuance costs, shares		58,260,391
Issuance of common stock for Calnetix Power Solutions acquisition	1,798	2	1,796
Issuance of common stock for Calnetix Power Solutions acquisition, shares	1,550,387	1,550,387
Net loss	(67,241)			(67,241)
Balance at Mar. 31, 2010	46,432	243	721,408	(674,178)	(1,041)
Balance, shares at Mar. 31, 2010		243,015,511			896,109
Increase (Decrease) in Stockholders' Equity
Purchase of treasury stock	(53)				(53)
Purchase of treasury stock, shares					53,511
Vested restricted stock awards		1	(1)
Vested restricted stock awards, shares		742,460
Stock-based compensation	2,318		2,318
Exercise of stock options and employee stock purchases	74		74
Exercise of stock options and employee stock purchases, shares		72,842
Stock awards to Board of Directors	100		100
Stock awards to Board of Directors, shares		109,554
Warrants exercised	20,981	13	20,968
Warrants exercised, shares		12,473,231
Issuance of common stock for Calnetix Power Solutions acquisition	3,098	3	3,095
Issuance of common stock for Calnetix Power Solutions acquisition, shares	3,131,313	3,131,313
Net loss	(38,470)			(38,470)
Balance at Mar. 31, 2011	34,480	260	747,962	(712,648)	(1,094)
Balance, shares at Mar. 31, 2011		259,544,911			949,620
Increase (Decrease) in Stockholders' Equity
Purchase of treasury stock	(78)				(78)
Purchase of treasury stock, shares					48,200
Vested restricted stock awards, shares		699,107
Stock-based compensation	1,558		1,558
Exercise of stock options and employee stock purchases	780	1	779
Exercise of stock options and employee stock purchases, shares		785,504
Stock awards to Board of Directors	94		94
Stock awards to Board of Directors, shares		77,971
Warrants exercised	17,401	16	17,385
Warrants exercised, shares		16,657,820
Issuance of common stock, net of issuance costs	23,146	23	23,123
Issuance of common stock, net of issuance costs, shares		22,550,000
Net loss	(18,764)			(18,764)
Balance at Mar. 31, 2012	$ 58,617	$ 300	$ 790,901	$ (731,412)	$ (1,172)
Balance, shares at Mar. 31, 2012		300,315,313			997,820