Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details 2)

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Stock-Based Compensation (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Stock-Based Compensation        
Stock-based compensation expense $ 358 $ 442 $ 696 $ 862
Cost of goods sold
       
Stock-Based Compensation        
Stock-based compensation expense 27 38 53 76
Research and development
       
Stock-Based Compensation        
Stock-based compensation expense 73 90 148 171
Selling, general and administrative
       
Stock-Based Compensation        
Stock-based compensation expense $ 258 $ 314 $ 495 $ 615