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Amount of Shares of Common Stock Reserved (Detail) - shares
Dec. 31, 2016
Mar. 31, 2016
Stock Option Outstanding [Line Items]    
Common stock issued and outstanding 6,033,518  
Warrants outstanding 1,970,166 2,091,166
Stock options outstanding 1,165,850 1,064,150
Preferred stock outstanding 1,666,666  
Common stock reserved for future issuance 10,836,200