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Share-Based Payments - Summary of option activity under the equity plans (Details 1) - Stock options
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Mar. 31, 2016
USD ($)
$ / shares
shares
Shares  
Granted 10
Exercised (13)
Forfeited (3)
Weighted Average Exercise Price  
Granted | $ / shares $ 3.01
Equity plans  
Shares  
Outstanding at March 31, 2015 363
Granted 10
Exercised (13)
Forfeited (3)
Outstanding at March 31, 2016 357
Exercisable at March 31, 2016 198
Weighted Average Exercise Price  
Outstanding at March 31, 2015 | $ / shares $ 9.86
Granted | $ / shares 12.95
Exercised | $ / shares 6.45
Forfeited | $ / shares 10.07
Outstanding at March 31, 2016 | $ / shares 10.07
Exercisable at March 31, 2016 | $ / shares $ 7.75
Weighted Average Remaining Contractual Term  
Outstanding at March 31, 2016 5 years 9 months
Exercisable at March 31, 2016 4 years 15 days
Aggregate Intrinsic Value  
Outstanding at March 31, 2016 | $ $ 725
Exercisable at March 31, 2016 | $ $ 725