Inventories (Tables)

6 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Inventories

The components of inventories and related changes in the allowance for excess and obsolete inventories account are as follows:

	June 30, 2020		December 31, 2019
	(in thousands)
Raw materials	$	79,902	$	68,842
Work in process	2,275		1,825
Finished goods	5,607		5,578
Total, gross	87,784		76,245
Less:  Allowance for excess and obsolete inventories	(2,373)		(2,644)
Total, net	$	85,411	$	73,601

Inventories (Allowance)

	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Allowance for excess and obsolete inventories:	(in thousands)
Balance, beginning of period	$	2,365	$	1,567	$	2,644	$	1,210
Provisions (recoveries) for excess and	81		796		(193)		1,153
obsolete inventories
Inventories written off	(73)		(13)		(78)		(13)
Balance, end of period	$	2,373	$	2,350	$	2,373	$	2,350