Amount of Shares of Common Stock Reserved (Detail) - shares	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Stock Option Outstanding [Line Items]
Common stock issued and outstanding	5,876,852
Warrants outstanding	2,091,166	914,500	714,500
Stock options outstanding	1,064,150	776,500	628,700
Preferred stock	1,666,666
Common stock reserved for future issuance	10,698,834