Annual report pursuant to Section 13 and 15(d)

Income Taxes - Unrecognized Tax Benefits (Detail)

v3.20.1
Income Taxes - Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Balance at beginning of year $ 2,221 $ 1,932 $ 1,319
Additions based on tax positions related to the current year 0 289 613
Reductions based on tax positions related to prior years (80) 0 0
Balance at end of year $ 2,141 $ 2,221 $ 1,932