Quarterly report pursuant to Section 13 or 15(d)

Warrants - Additional Information (Detail)

Warrants - Additional Information (Detail) (USD $)	1 Months Ended			3 Months Ended
Warrants - Additional Information (Detail) (USD $)	Aug. 31, 2014	Jun. 30, 2013	Oct. 31, 2009	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Class of Warrant or Right [Line Items]
Number of shares of common stock called by warrants	162,539	301,778	27,839	13,647,848		301,778
Weighted average exercise price of warrants				$ 0.99
Weighted average remaining life of warrants				4 years 3 months 18 days
Number of shares purchased for warrants exercised				62,129
Warrant exercisable term	5 years		5 years
Warrants, exercise price per share	$ 1invest_InvestmentWarrantsExercisePrice	$ 0.66invest_InvestmentWarrantsExercisePrice	$ 0.60invest_InvestmentWarrantsExercisePrice
Changes in fair value of derivative warrant liability					$ (1,518)us-gaap_FairValueAdjustmentOfWarrants
Additional warrants issued		48,222
Placement Agent Member \| 2014 Private Placement [Member]
Class of Warrant or Right [Line Items]
Number of shares of common stock called by warrants				2,047,000
Warrant exercisable term				5 years
Warrants, exercise price per share				$ 1.00
Debt instrument redemption description				These warrants have a provision that permits the Company to call and redeem the warrants after a thirty day notice period if the stock trades at $2.50 or greater on a volume weighted average basis for at least twenty consecutive trading days
Series A Convertible Preferred Stock [Member] \| Investors And Former Holders Of Series A Convertible Preferred Stock [Member] \| 2014 Private Placement [Member]
Class of Warrant or Right [Line Items]
Number of shares of common stock called by warrants				11,177,612
Warrant exercisable term				5 years
Warrants, exercise price per share				$ 1.00
Notice period provision to call and redeem warrants				30 days
Minimum trading price of warrants				$ 2.50
Threshold trading period to call and redeem warrants				20 years
Interest Expense [Member]
Class of Warrant or Right [Line Items]
Changes in fair value of derivative warrant liability			1,005
General and Administrative Expense [Member]
Class of Warrant or Right [Line Items]
Estimated fair value of warrants		$ 21,910