XML 57 R41.htm IDEA: XBRL DOCUMENT v3.6.0.2
Summary of Significant Accounting Policies - Summary of Intangible Assets, Net of Accumulated Impairment Charges (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Cost $ 630 $ 630
Accumulated Impairment (630) (430)
Net Book Value   200
IPR&D [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 630 630
Accumulated Impairment (630) (430)
Net Book Value $ 0 $ 200