Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details 3)

v2.4.0.6
Stock-Based Compensation (Details 3) (USD $)
 3 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Shares    
Outstanding at the end of the period (in shares) 3,300,000  
Share based compensation expenses $ 338,000 $ 420,000
Stock options
    
Shares    
Outstanding at the beginning of the period (in shares) 10,039,651  
Granted (in shares)   250,000
Forfeited, cancelled or expired (in shares) (128,996)  
Outstanding at the end of the period (in shares) 9,910,655  
Vested and expected to vest (in shares) 9,848,088  
Exercisable (in shares) 8,486,443  
Share based compensation expenses 200,000 200,000
Weighted Average Exercise Price    
Outstanding at the beginning of the period (in dollars per share) $ 1.41  
Forfeited, cancelled or expired (in dollars per share) $ 2.15  
Outstanding at the end of the period (in dollars per share) $ 1.40  
Vested and expected to vest (in dollars per share) $ 1.40  
Exercisable (in dollars per share) $ 1.42  
Weighted Average Remaining Contractual Term (in years)    
Outstanding at the end of the period 5 years 6 months 18 days  
Vested and expected to vest 5 years 6 months 11 days  
Exercisable 5 years 1 month 20 days  
Aggregate Intrinsic Value    
Outstanding at the end of the period 463,617  
Vested or expected to vest 463,409  
Exercisable 417,179  
Additional disclosure    
Weighted average grant date fair value (in dollars per share)   $ 1.77
Unrecognized compensation cost $ 1,200,000  
Weighted average period for recognizing compensation cost 2 years  
Weighted-average assumptions used to calculate estimated fair value of each stock option    
Risk-free interest rates (as a percent) 0.00% 1.98%
Expected lives (in years) 0 years 5 years
Dividend yield (as a percent) 0.00% 0.00%
Expected volatility (as a percent) 0.00% 89.20%