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Stock Option Activity (Detail) - $ / shares
9 Months Ended 12 Months Ended
Dec. 31, 2016
Mar. 31, 2016
Shares    
Beginning balance 1,064,150  
Granted 149,200  
Cancelled 0  
Exercised 0  
Expired (47,500)  
Forfeited 0  
Ending balance 1,165,850 1,064,150
Vested 988,687  
Weighted Average Per Share Exercise Price    
Beginning balance $ 4.27  
Granted 4.78  
Cancelled 0  
Exercised 0  
Expired 6.76  
Forfeited 0  
Ending balance 4.24 $ 4.27
Vested $ 3.99  
Weighted Average Remaining Life (Years)    
Balance 6 years 10 months 17 days 7 years 11 months 8 days
Vested 6 years 6 months 14 days  
Weighted Average Per Share Intrinsic Value    
Beginning Balance $ 2.27  
Ending balance 1.61 $ 2.27
Vested $ 1.87