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Summary of Intangible Assets Net (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 2,017us-gaap_FiniteLivedIntangibleAssetsGross $ 2,017us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated Amortization (925)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (875)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Net Carrying Amount 1,092us-gaap_FiniteLivedIntangibleAssetsNet 1,142us-gaap_FiniteLivedIntangibleAssetsNet
Reacquired license - INTERCEPT Asia    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 2,017us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
2,017us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
Accumulated Amortization (925)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
(875)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
Net Carrying Amount $ 1,092us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
$ 1,142us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember