Quarterly report pursuant to Section 13 or 15(d)

Corporate Information - Additional Information (Detail)

v2.4.1.9
Corporate Information - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
 0 Months Ended 1 Months Ended
Dec. 23, 2014
Dec. 31, 2014
Dec. 23, 2014
Organization And Description Of Business [Line Items]      
Exercise price of warrants $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 $ 2.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Warrant exercisable period 5 years 5 years  
Private Placement [Member]      
Organization And Description Of Business [Line Items]      
Stock issued 6,779,510us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember 		   
Sales of common stock, price per share $ 2.00us-gaap_SaleOfStockPricePerShare
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember 		  $ 2.00us-gaap_SaleOfStockPricePerShare
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
Proceeds from sale of stock $ 13.56us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember 		   
Common Stock [Member]      
Organization And Description Of Business [Line Items]      
Aggregate shares issued upon acquisition 542,360us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember