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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ in Millions
6 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Restricted Stock and Stock Awards    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Restricted stock granted 392,689 319,250
Vesting period, in years 3 years 3 years
Unrecognized compensation cost for unvested employee stock-based compensation awards outstanding, net of forfeitures $ 3.5  
Weighted-average period over which unrecognized compensation expense is expected to be recognized (years) 2 years 2 months 12 days  
Stock Options    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Stock options granted in period   100,000
Vesting period, in years   5 years
Unrecognized compensation cost for unvested employee stock-based compensation awards outstanding, net of forfeitures $ 0.9  
Weighted-average period over which unrecognized compensation expense is expected to be recognized (years) 2 years 10 months 24 days