Inventories

3 Months Ended

Mar. 31, 2023

Inventory Disclosure [Abstract]

Inventories

4. Inventories

Inventories consisted of the following:

(in thousands)	March 31, 2023			December 31, 2022
Raw materials	$	21,661		$	19,774
Work in process		9,091			7,183
Finished goods		2,466			2,436
Obsolescence allowance		(2,920	)		(2,867	)
Total inventories	$	30,298		$	26,526

Amounts credited to the allowance for obsolete inventory and charged to cost of sales amounted to $0.2 million for each of the three months ended March 31, 2023 and 2022.