Inventories (Allowance) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Inventory Valuation Reserves [Roll Forward]
Balance, beginning of period	$ 735	$ 537	$ 579	$ 363
Provisions for excess and obsolete inventories	67	267	223	468
Inventories written off	0	0	0	(27)
Balance, end of period	$ 802	$ 804	$ 802	$ 804