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Stock Option Activity (Detail) - $ / shares
3 Months Ended 12 Months Ended
Jun. 30, 2016
Mar. 31, 2016
Shares    
Beginning balance 1,064,150  
Granted 0  
Cancelled 0  
Exercised 0  
Expired (36,000)  
Forfeited 0  
Ending balance 1,028,150 1,064,150
Vested 861,202  
Weighted Average Per Share Exercise Price    
Beginning balance $ 4.27  
Granted 0  
Cancelled 0  
Exercised 0  
Expired 6.49  
Forfeited 0  
Ending balance 4.19 $ 4.27
Vested $ 3.68  
Weighted Average Remaining Life (Years)    
Balance 7 years 22 days 7 years 11 months 8 days
Vested 6 years 9 months 11 days  
Weighted Average Per Share Intrinsic Value    
Beginning Balance $ 2.27  
Ending balance 2.15 $ 2.27
Vested $ 2.56