Income Taxes - Schedule of Income Taxes Differ from Amount Computed by Applying Statutory U.S. Federal Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax expense at U.S. statutory rate	$ (2,887)	$ (4,468)	$ (20,946)
State income taxes, net of federal benefit	(423)	103	(2,261)
Effect of foreign subsidiaries	1,783	1,841	(283)
Tax credits	(672)	(660)	(686)
Global intangible low-taxed income inclusion	2,744	2,141
Other permanent items	783	(199)	(2,374)
Change in uncertain tax positions		346
True-up from prior years	512	(571)
Change in domestic tax rate			19,353
Other	44	1	330
Change in valuation allowance	2,499	6,124	6,458
Income taxes	$ 4,383	$ 4,658	$ (409)