Inventories (Tables)

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consist of the following (in thousands):

	March 31, 2021		December 31, 2020
Raw materials and purchased parts	$	3,054	$	6,498
Work in progress		1,728		776
Finished goods		21,542		21,572
Total inventories	$	26,324	$	28,846