Summary of Significant Accounting Policies Inventories (Tables)

12 Months Ended

Dec. 31, 2012

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following (in thousands):

	December 31, 2012		December 31, 2011
Purchased materials	$	2,081	$	2,346
Work‑in‑process	—		86
Finished goods	9,648		8,693
	$	11,729	$	11,125