Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Treasury Stock
Balance at Mar. 31, 2010 $ 46,432,000 $ 243,000 $ 721,408,000 $ (674,178,000) $ (1,041,000)
Balance (in shares) at Mar. 31, 2010   243,015,511     896,109
Increase (Decrease) in Stockholders' Equity          
Purchase of treasury stock (53,000)       (53,000)
Purchase of treasury stock (in shares)         53,511
Vested restricted stock awards   1,000 (1,000)    
Vested restricted stock awards (in shares)   742,460      
Stock-based compensation 2,318,000   2,318,000    
Exercise of stock options and employee stock purchases 74,000   74,000    
Exercise of stock options and employee stock purchases (in shares)   72,842      
Stock awards to Board of Directors 100,000   100,000    
Stock awards to Board of Directors (in shares)   109,554      
Warrants exercised 20,981,000 13,000 20,968,000    
Warrants exercised (in shares)   12,473,231      
Issuance of common stock for Calnetix Power Solutions acquisition 3,098,000 3,000 3,095,000    
Issuance of common stock for Calnetix Power Solutions acquisition (in shares) 3,131,313 3,131,313      
Net loss (38,470,000)     (38,470,000)  
Balance at Mar. 31, 2011 34,480,000 260,000 747,962,000 (712,648,000) (1,094,000)
Balance (in shares) at Mar. 31, 2011   259,544,911     949,620
Increase (Decrease) in Stockholders' Equity          
Purchase of treasury stock (78,000)       (78,000)
Purchase of treasury stock (in shares)         48,200
Vested restricted stock awards (in shares)   699,107      
Stock-based compensation 1,558,000   1,558,000    
Exercise of stock options and employee stock purchases 780,000 1,000 779,000    
Exercise of stock options and employee stock purchases (in shares)   785,504      
Stock awards to Board of Directors 94,000   94,000    
Stock awards to Board of Directors (in shares)   77,971      
Warrants exercised 17,401,000 16,000 17,385,000    
Warrants exercised (in shares)   16,657,820      
Issuance of common stock, net of issuance costs 23,146,000 23,000 23,123,000    
Issuance of common stock, net of issuance costs (in shares)   22,550,000      
Net loss (18,764,000)     (18,764,000)  
Balance at Mar. 31, 2012 58,617,000 300,000 790,901,000 (731,412,000) (1,172,000)
Balance (in shares) at Mar. 31, 2012   300,315,313     997,820
Increase (Decrease) in Stockholders' Equity          
Purchase of treasury stock (40,000)       (40,000)
Purchase of treasury stock (in shares)         40,883
Vested restricted stock awards (in shares)   469,911      
Stock-based compensation 1,500,000   1,500,000    
Exercise of stock options and employee stock purchases 21,000 1,000 20,000    
Exercise of stock options and employee stock purchases (in shares)   22,478      
Stock awards to Board of Directors 101,000   101,000    
Stock awards to Board of Directors (in shares)   103,574      
Issuance of common stock upon exercise of put option 4,250,000 5,000 4,245,000    
Issuance of common stock upon exercise of put option (in shares)   4,750,000      
Net loss (22,563,000)     (22,563,000)  
Balance at Mar. 31, 2013 $ 41,886,000 $ 306,000 $ 796,767,000 $ (753,975,000) $ (1,212,000)
Balance (in shares) at Mar. 31, 2013   305,661,276     1,038,703