Summary of Significant Accounting Policies Changes in Initial Product Warranty Accrual and Expenses Under Initial and Extended Warranties (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Balance	$ 1,653	$ 1,086	$ 1,132
Provision for estimated warranty cost	3,733	3,639	1,747
Warranty expenditures	(3,472)	(3,072)	(1,793)
Balance	1,914	1,653	1,086
Less: long-term portion of warranty accrual	593	360	521
Current portion of warranty accrual	$ 1,321	$ 1,293	$ 565