Inventories (Tables)

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories at December 31 consisted of the following (in thousands):

	2020		2019
Raw material	$	66,018	$	42,030
Work-in-process	5,382		5,023
Finished goods	31,205		18,460
Gross inventory	$	102,605	$	65,513
Less reserves	(4,298)		(3,556)
Total inventories	$	98,307	$	61,957

Summary of Activity within the Reserve for Excess, Obsolete, and Slow Moving Inventory

The following table summarizes activity recorded within the reserve for excess, obsolete and slow moving inventory for the years ended December 31 (in thousands):

	2020		2019		2018
Beginning balance	$	3,463	$	2,971	$	2,852
Excess, obsolete and slow moving inventory expense	355		1,134		363
Scrapped inventory and other adjustments	343		(642)		(244)
Ending balance	$	4,161	$	3,463	$	2,971