Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

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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