Quarterly report pursuant to sections 13 or 15(d)

Common Stock Warrants - Additional Information (Detail)

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Common Stock Warrants - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Class of Warrant or Right [Line Items]  
Proceeds from sale of common stock $ 2,402,000
Fair value of warrant liabilities 400,000
Warrants, Exercise price of $5.75 per share [Member]
 
Class of Warrant or Right [Line Items]  
Issued warrants to purchase common stock 120,800
Proceeds from sale of common stock $ 3,000,000
Exercise price of common stock 5.75
Warrant term 5 years