Inventories (Allowance) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Inventory Valuation Reserves [Roll Forward]
Balance, beginning of period	$ 583	$ 532	$ 579	$ 363
Provisions for excess and obsolete inventories	152	5	156	201
Inventories written off	0	0	0	(27)
Balance, end of period	$ 735	$ 537	$ 735	$ 537