Inventories (Allowance) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Inventory Valuation Reserves [Roll Forward]
Balance, beginning of period	$ 537	$ 300	$ 363	$ 300
Provisions for excess and obsolete inventories	267	0	468	0
Inventories written off	0	0	(27)	0
Balance, end of period	$ 804	$ 300	$ 804	$ 300