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Stock Warrants - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended
Mar. 21, 2013
Mar. 31, 2013
Mar. 31, 2013
Class of Warrant or Right [Line Items]      
Weighted average term of warrants     2 years 6 months
Warrants, Exercise Price   $ 4.72 $ 6.84
Warrants Exercisable Share     $ 186,420
Conversion of Stock, Shares Issued 186,480 186,420 200,000
Minimum
     
Class of Warrant or Right [Line Items]      
Outstanding Warrants Expiration Date     May 31, 2013
Maximum
     
Class of Warrant or Right [Line Items]      
Outstanding Warrants Expiration Date     Mar. 21, 2018