Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail)

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Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Beginning balance $ 1,246 $ 0 $ 0
Prior periods 0 1,246 0
Current period 0 0 0
Settlement with tax authorities 0 0 0
Expiration of applicable statutes of limitation (471) 0 0
Ending balance $ 775 $ 1,246 $ 0