Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - RSU's and PRSU's (Details)

v3.5.0.2
Stock-Based Compensation - RSU's and PRSU's (Details) - USD ($)
3 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Additional disclosure    
Share based compensation expenses $ 238,000 $ 463,000
Restricted stock units    
Shares    
Nonvested, balance at the end of the period (in shares) 1,562  
Additional disclosure    
Vesting period 4 years  
Share based compensation expenses $ 188,000 294,000
Aggregate fair value of restricted stock units vested and issued 22,000 $ 198,000
Weighted average grant date fair value of options granted during the period (in dollars per share)   $ 11.52
Unrecognized compensation cost $ 700,000  
Weighted average period for recognizing compensation cost 2 years 7 months 6 days  
Restricted stock units | Awards vesting over four years with one-fourth units vesting one year after the issuance date    
Additional disclosure    
Vesting period 1 year  
Awards vesting percentage 25.00%  
PRSU Program    
Shares    
Nonvested, balance at the beginning of the period (in shares) 256,787  
Vested and issued (in shares) (14,609)  
Forfeited (in shares) (18,510)  
Nonvested, balance at the end of the period (in shares) 223,668  
Awards expected to vest (in shares) 223,657  
Weighted Average Grant-Date Fair Value    
Nonvested restricted stock units outstanding at the beginning of the period (in dollars per share) $ 6.53  
Vested and issued (in dollars per share) 20.44  
Forfeited (in dollars per share) 7.08  
Nonvested restricted stock units outstanding at the end of the period (in dollars per share) 5.57  
Awards expected to vest (in dollars per share) $ 5.57  
Additional disclosure    
Performance measurement period 3 years  
Vesting right percentage of awards that will vest after end of applicable performance measurement period 50.00%  
Vesting right percentage of awards that will vest one year after end of performance measurement period 50.00%  
Restricted Stock Awards    
Shares    
Granted (in shares) 32,201 3,459
Additional disclosure    
Share based compensation expenses $ 50,000 $ 30,000
Weighted average grant date fair value of options granted during the period (in dollars per share) $ 1.57 $ 8.60
Chief Executive Officer | PRSU Program    
Shares    
Granted (in shares) 0 10,000
Additional disclosure    
Share based compensation expenses $ 0  
Weighted average grant date fair value of options granted during the period (in dollars per share)   $ 15.50