Inventories (Tables)

12 Months Ended

Dec. 31, 2019

Inventories

Schedule of components of inventories

Our inventories are valued at the lower of cost or net realizable value and computed on a first-in, first-out (FIFO) basis. Components of inventories are as follows:

	December 31,
	2019		2018
Parts and raw materials	$	134,816	$	76,647
Work in process		10,269		6,644
Finished goods		84,934		14,696
Total	$	230,019	$	97,987