Inventories (Tables)

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following at December 31, 2018 and 2017 (in thousands):

	2018		2017
Finished goods	$	26,636	$	21,668
Parts and materials	13,704		10,613
Work in progress	5,324		1,036
Total inventories	$	45,664	$	33,317