Inventories

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Inventories

Inventories

The components of inventories as of March 31, 2021 and December 31, 2020 were:

	March 31, 2021		December 31, 2020
Raw materials and component parts	$	180,230	$	173,248
Work in process	35,746		29,436
Finished goods	88,660		87,226
Total inventories	$	304,636	$	289,910

Inventories are stated at the lower of cost or net realizable value. Cost, which includes material, labor and factory overhead, is determined on a first in, first out basis.