Annual report pursuant to Section 13 and 15(d)

Warrants - Additional Information (Detail)

v2.4.1.9
Warrants - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 17, 2014
Equity [Abstract]    
Number of common stock purchased 542,360us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased  
Exercise price of warrants $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 $ 2us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Warrant exercisable period 5 years  
Warrant expense recognized $ 664,064us-gaap_FairValueAdjustmentOfWarrants