Inventories

6 Months Ended

Jun. 30, 2022

Inventory Disclosure [Abstract]

Inventories

4. Inventories

(table only in thousands)	June 30, 2022			December 31, 2021
Raw materials	$	17,607		$	13,405
Work in process		6,738			5,147
Finished goods		2,439			674
Obsolescence allowance		(2,803	)		(2,174	)
Total inventories	$	23,981		$	17,052

Amounts credited to the allowance for obsolete inventory and charged to cost of sales amounted to ($0.1) million and $0.1 million for the three-month periods ended June 30, 2022 and 2021, and $0.1 million and $0.2 million for the six-month periods ended June 30, 2022 and 2021, respectively.