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 6 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Jun. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Shares          
Outstanding at the end of the period (in shares) 3,550,000     3,550,000  
Share based compensation expenses $ 358,000 $ 442,000   $ 696,000 $ 862,000
Stock options
          
Shares          
Outstanding at the beginning of the period (in shares)       10,039,651  
Granted (in shares) 250,000   250,000 1,958,330  
Forfeited, cancelled or expired (in shares)       (134,996)  
Outstanding at the end of the period (in shares) 11,862,985     11,862,985  
Vested and expected to vest (in shares) 11,569,646     11,569,646  
Exercisable (in shares) 8,722,942     8,722,942  
Share based compensation expenses 200,000 300,000   400,000 500,000
Weighted Average Exercise Price          
Outstanding at the beginning of the period (in dollars per share)       $ 1.41  
Granted (in dollars per share)       $ 1.01  
Forfeited, cancelled or expired (in dollars per share)       $ 2.11  
Outstanding at the end of the period (in dollars per share) $ 1.34     $ 1.34  
Vested and expected to vest (in dollars per share) $ 1.35     $ 1.35  
Exercisable (in dollars per share) $ 1.41     $ 1.41  
Weighted Average Remaining Contractual Term (in years)          
Outstanding at the end of the period       6 years 18 days  
Vested and expected to vest       5 years 11 months 16 days  
Exercisable       4 years 11 months 5 days  
Aggregate Intrinsic Value          
Outstanding at the end of the period 434,577     434,577  
Vested or expected to vest 434,518     434,518  
Exercisable 407,145     407,145  
Additional disclosure          
Weighted average grant date fair value (in dollars per share) $ 1.01 $ 1.13   $ 1.01 $ 1.71
Unrecognized compensation cost $ 2,100,000     $ 2,100,000  
Weighted average period for recognizing compensation cost       3 years  
Weighted-average assumptions used to calculate estimated fair value of each stock option          
Risk-free interest rates (as a percent) 0.80% 0.90%   0.80% 1.90%
Expected lives (in years) 5 years 8 months 12 days 5 years   5 years 8 months 12 days 5 years
Expected volatility (as a percent) 79.80% 87.40%   79.80% 89.00%