Income Taxes - Difference by Applying the Statutory Federal Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Provision computed at statutory rate	$ 12,086	$ 2,327	$ 4,726
Increase resulting from:
Difference in rates for foreign jurisdictions	(42)	(42)	17
Stock-based compensation	(1,984)	(3,903)	(1,314)
Nondeductible inducement expense	0	4,458	0
Other non-deductible expenses	131	97	548
Non-deductible officers compensation	4,098	1,665	899
State income tax provision	2,237	1,344	974
Subsidiary earnings taxed in the US	333	1,176	(40)
Research and development credit	(726)	(468)	(466)
Valuation allowance	(343)	474	71
Change in tax rate	(24)	3,006	(20)
Other	179	(4)	41
Provision for income taxes	$ 15,945	$ 10,130	$ 5,436

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