Computation of Diluted Earnings Per Share (Detail) - shares	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental shares assumed issued on exercise of in the money	3,370,109	2,258,666	4,576,220	2,308,666
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental shares assumed issued on exercise of in the money	169,500	104,500	1,295,611	114,500
Preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental shares assumed issued on exercise of in the money	1,666,666	1,666,666	1,666,666	1,666,666
Convertible notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental shares assumed issued on exercise of in the money	514,093	0	514,093	0
Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental shares assumed issued on exercise of in the money	1,019,850	487,500	1,099,850	527,500