XML 45 R21.htm IDEA: XBRL DOCUMENT v3.20.1
Intangibles - Components of Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]    
Intangible assets, Net Carrying Value $ 2,031 $ 2,087
License Agreements [Member]    
Finite Lived Intangible Assets [Line Items]    
Intangible assets, Gross Carrying Value 3,117 3,117
Intangible assets, Accumulated Amortization (1,086) (1,030)
Intangible assets, Net Carrying Value $ 2,031 $ 2,087