Inventories (Tables)

6 Months Ended

Jun. 30, 2015

Inventory Disclosure [Abstract]

Components of inventory

The components of inventories consist of the following (in thousands):

	December 31, 2014		June 30, 2015
Purchased parts and materials	$	2,273	$	3,303
Finished goods	9,069		5,898
Total inventory	$	11,342	$	9,201