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Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Deduction percentage of dividends received from distribution to earnings previously taxed	100.00%
Cash dividend declared from Philippines entities	$ 20,700,000
Additional income tax expense	$ 2,384,000
Increase in effective tax rate	0.014
Tax loss carryforwards	$ 6,551,000	$ 12,031,000
Tax credit carryforwards	4,713,000	5,200,000
Capital loss carryforwards	633,000	621,000
Valuation Allowance	896,000	2,994,000
Unrecognized tax benefits	4,735,000	3,273,000	$ 168,000	$ 1,927,000
Unrecognized tax benefits that, if recognized, would impact effective tax rates	4,545,000	3,105,000	162,000
Net interest and penalty expense (income)	31,000	19,000	(26,000)
Income tax liability for interest and penalties	$ 80,000	$ 49,000
Unrecognized tax benefits from adjustments related to examination			1,526,000
Income tax refund receivable			$ 1,326,000

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