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Summary of Intangible Assets Net (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 2,017 $ 2,017
Accumulated Amortization (1,683) (1,481)
Net Carrying Amount 334 536
Reacquired license - INTERCEPT Asia    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 2,017 2,017
Accumulated Amortization (1,683) (1,481)
Net Carrying Amount $ 334 $ 536