Inventories (Tables)

9 Months Ended

Sep. 30, 2013

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following (in thousands):

	September 30, 2013		December 31, 2012
Purchased materials	$	1,568	$	2,081
Work‑in‑process	28		—
Finished goods	6,446		9,648
	$	8,042	$	11,729