Amount of Shares of Common Stock Reserved (Detail)	Jun. 30, 2014	Mar. 31, 2014
Stock Option Outstanding [Line Items]
Common stock issued and outstanding	49,134,549
Conversion of 9% Notes	2,750,000
Warrants outstanding	7,145,000	7,145,000
Stock options outstanding	6,287,000	6,287,000
Remaining shares issuable under 2013 Equity Incentive Plan	2,400,000
Common stock reserved for future issuance	67,716,549