Federal Income Tax Provision Compared With Statutory Rates (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Statutory regular federal income tax rate	(21.00%)	(21.00%)	(21.00%)
Change in valuation allowance	(92.80%)	34.20%	(6.80%)
State tax benefit (net of federal benefit)	(3.90%)	(4.80%)	(4.80%)
Research credits	0.00%	(0.60%)	0.60%
Foreign amounts with no tax benefit	0.10%	0.00%	(0.10%)
Non-deductible expenses	0.60%	(4.20%)	(4.10%)
Effect of change in rate	(4.50%)	0.00%	9.70%
Expired net operating loss carryforwards	0.00%	0.00%	3.70%
Net operating loss 382 write-offs	113.40%	0.00%	0.00%
Effect of prior year true-ups	1.20%	(4.30%)	22.80%
Other	(0.60%)	1.10%	0.70%
Total	0.30%	0.40%	0.70%