Annual report pursuant to Section 13 and 15(d)

Condensed Financial Statements - Summary of Components of Interest, Net (Detail)

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Condensed Financial Statements - Summary of Components of Interest, Net (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]      
Interest expense $ (1,490) $ (1,257) $ (261)
Interest income 1,600 1,521 260
Total $ 110 $ 264 $ (1)