Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details 4)

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Stock-Based Compensation (Details 4) (USD $)
3 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Mar. 31, 2013
Additional disclosure      
Stock-based compensation expense $ 734,000 $ 338,000  
Number of preferred stock purchase right for each share of common stock 1    
Preferred stock, par value (in dollars per share) $ 0.001   $ 0.001
Purchase price (in dollars per share) $ 10.00    
Period following public announcement of beneficial ownership acquired by various persons resulting in rights becoming exercisable 10 days    
Beneficial ownership of common stock (as a percent) 20.00%    
Period following commencement of tender offer or exchange offer that would result in acquisition of beneficial ownership various persons resulting in rights becoming exercisable 10 days    
Series A Junior Participating Preferred Stock
     
Additional disclosure      
Preferred stock conversion basis 0.01    
Restricted stock units
     
Shares      
Nonvested, balance at the beginning of the period (in shares) 1,467,096    
Granted (in shares) 530,060    
Vested and issued (in shares) (292,914)    
Forfeited (in shares) (18,320)    
Nonvested, balance at the end of the period (in shares) 1,685,922    
Awards expected to vest (in shares) 1,515,907    
Weighted Average Grant-Date Fair Value      
Nonvested restricted stock units outstanding at the beginning of the period (in dollars per share) $ 1.10    
Granted (in dollars per share) $ 0.95    
Vested and issued (in dollars per share) $ 1.13    
Forfeited (in dollars per share) $ 0.96    
Nonvested restricted stock units outstanding at the end of the period (in dollars per share) $ 1.05    
Awards expected to vest (in dollars per share) $ 1.05    
Additional disclosure      
Total fair value of units vested and issued 300,000 100,000  
Stock-based compensation expense 300,000 100,000  
Unrecognized compensation cost $ 1,200,000    
Weighted average period for recognizing compensation cost 2 years 7 months 6 days    
Weighted average grant date fair value of options granted during the period $ 0.95 $ 0.95  
Non-employee director
     
Weighted Average Grant-Date Fair Value      
Granted (in dollars per share) $ 1.28 $ 1.00  
Additional disclosure      
Number of shares issued 22,258 22,162