Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories consist of the following (in thousands):

	March 31, 2018		December 31, 2017
Purchased materials	$	624	$	148
Finished goods	2,942		3,103
	$	3,566	$	3,251