Warrants Outstanding (Detail)	3 Months Ended
	Jun. 30, 2016 $ / shares shares
Class of Warrant or Right [Line Items]
Weighted Average Per Share Intrinsic Value, Outstanding | $ / shares	$ 3.12
Weighted Average Per Share Intrinsic Value, Granted | $ / shares	0
Weighted Average Per Share Intrinsic Value, Exercised | $ / shares	4.46
Weighted Average Per Share Intrinsic Value, Cancelled | $ / shares	0
Weighted Average Per Share Intrinsic Value, Outstanding | $ / shares	$ 1.79
Number of warrants, Outstanding | shares	2,091,166
Number of warrants, Granted | shares	0
Number of warrants, Exercised | shares	(115,000)
Number of warrants, Cancelled | shares	0
Number of warrants, Outstanding | shares	1,976,166