Inventories (Tables)

9 Months Ended

Sep. 30, 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:

	September 30,		December 31,
	2019		2018
Parts and raw materials	$	141,672	$	76,647
Work in process		13,810		6,644
Finished goods		85,217		14,696
Total	$	240,699	$	97,987