Quarterly report pursuant to Section 13 or 15(d)

7. Stock-Based Compensation (Tables)

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7. Stock-Based Compensation (Tables)
9 Months Ended
Dec. 31, 2012
Stock-Based Compensation Tables  
Employee stock-based compensation expense
    Three Months     Nine Months  
    Ended     Ended  
    December 31,     December 31,  
    2012     2011     2012     2011  
Cost of service revenue   $ 37     $ 29     $ 103     $ 79  
Research and development     57       72       187       210  
Selling, general and administrative     176       695       660       1,432  
Total stock-based compensation   $ 270     $ 796     $ 950     $ 1,721  
Fair value of employee stock options
   

Three Months

Ended

December 31,

   

Nine Months

Ended

December 31,

 
    2012     2011     2012     2011  
Expected life   5.00 years     5.04 years     5.79 years     5.71 years  
Risk-free interest rate     0.62%       0.88%       0.72%       1.34%  
Dividend yield     0.00%       0.00%       0.00%       0.00%  
Volatility     89%       83%       88%       83%  
Summary of all option activity
    Shares
(in thousands)
    Weighted-Average
Exercise
Price
    Weighted-Average
Contractual
Term
    Aggregate
Intrinsic
Value
 (in thousands)
 
Options                                
Outstanding at April 1, 2012     6,266     $ 2.36                  
Granted     820       0.94                  
Exercised     (39 )     0.41                  
Forfeited or expired     (136 )     4.36                  
Outstanding at December 31, 2012     6,911     $ 2.16       7.06     $ 90  
Exercisable at December 31, 2012     5,483     $ 2.37       6.57     $ 90