Inventories

6 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Inventories

4. Inventories

(table only in thousands)	June 30, 2020			December 31, 2019
Raw materials	$	14,817		$	15,218
Work in process		6,432			7,328
Finished goods		541			654
Obsolescence allowance		(2,893	)		(2,622	)
Total inventories	$	18,897		$	20,578

Amounts credited to the allowance for obsolete inventory and charged to cost of sales amounted to $0.2 million for the three-month periods ended June 30, 2020 and 2019, and $0.3 million and $0.4 million for the six-month periods ended June 30, 2020 and 2019, respectively.