Summary of Intangible Assets Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,017	$ 2,017
Accumulated Amortization	(1,430)	(1,279)
Net Carrying Amount	587	738
Reacquired license - INTERCEPT Asia
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,017	2,017
Accumulated Amortization	(1,430)	(1,279)
Net Carrying Amount	$ 587	$ 738