Income Taxes - Summary of Deferred Income Taxes Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Noncurrent deferred tax assets:
Amortization and fixed assets	$ 7,371	$ 5,094
Inventories	3,914	2,325
Pension obligations	2,599	2,827
Warranty obligations	354	473
Accrued benefits	400	551
Operating leases	308	664
Tax credit carryforwards	7,106	6,030
Net operating loss carryforwards	14,944	17,369
Other temporary differences	5,483	7,089
Total noncurrent deferred tax assets	42,479	42,422
Valuation allowance	(18,371)	(16,441)
Net noncurrent deferred tax assets	24,108	25,981
Noncurrent deferred tax liabilities:
Amortization and fixed assets	(968)	(952)
Inventories	103	115
Pension obligations	0	161
Other temporary differences	(303)	(385)
Total noncurrent tax liabilities	(1,168)	(1,061)
Total net deferred tax asset	$ 22,940	$ 24,920