Inventories (Tables)

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following (in thousands):

	March 31, 2021		December 31, 2020
Finished goods	$	17,921	$	16,461
Parts and materials		18,241		19,098
Work in progress		2,955		2,592
Total inventories	$	39,117	$	38,151