Inventories (Tables)

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following (in thousands):

	June 30, 2019		December 31, 2018
Finished goods	$	26,928	$	26,636
Parts and materials		19,618		13,704
Work in progress		2,765		5,324
Total inventories	$	49,311	$	45,664