Inventories (Tables)

6 Months Ended

Jun. 30, 2014

Inventory Disclosure [Abstract]

Components of inventory

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

	December 31, 2013		June 30, 2014
Purchased parts and materials	$	2,911	$	2,027
Finished goods	3,628		5,505
Total inventory	$	6,539	$	7,532