Total Income Tax Expense Applying U.S. Federal Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Computed tax expense at statutory federal rates	$ 5,619	$ 3,874	$ 3,993
Increase (decrease) in taxes resulting from:
State taxes, net of federal income tax benefit	1,485	559	1,131
Unrecognized tax benefits	(1,783)	(2,092)	263
Bargain purchase gain on business acquisition	(35)	(978)
Income tax credits	(1,206)	(812)	(819)
Foreign tax rate differential	262	2,145	341
Stock based compensation	208	377	366
Global intangible low-taxed income	162		249
Change in valuation allowance	3,304
Other	150	7	(322)
Total	$ 8,166	$ 3,080	$ 5,202