Stock Option Activity (Detail) - $ / shares	6 Months Ended	12 Months Ended
	Sep. 30, 2016	Mar. 31, 2016
Shares
Beginning balance	1,064,150
Granted	1,200
Cancelled	0
Exercised	0
Expired	(39,694)
Forfeited	0
Ending balance	1,025,656	1,064,150
Vested	910,047
Weighted Average Per Share Exercise Price
Beginning balance	$ 4.27
Granted	6.00
Cancelled	0
Exercised	0
Expired	6.43
Forfeited	0
Ending balance	4.21	$ 4.27
Vested	$ 3.84
Weighted Average Remaining Life (Years)
Balance	6 years 9 months 29 days	7 years 11 months 8 days
Vested	6 years 7 months 13 days
Weighted Average Per Share Intrinsic Value
Beginning Balance	$ 2.27
Ending balance	1.94	$ 2.27
Vested	$ 2.19