XML 42 R76.htm IDEA: XBRL DOCUMENT v3.20.1
Commitments and Contingencies - Material Changes in Financial Condition (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]        
Total Assets $ 21,078 $ 19,084    
Total Liabilities 3,028 3,282    
Total Stockholders' Equity $ 18,050 $ 15,802 $ 7,879 $ 610