Summary of Significant Accounting Policies (Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of Significant Accounting Policies
Advertising costs	$ 1,100	$ 1,100	$ 400
Shipping and handling costs	7,000	4,500	$ 2,000
Capitalized software	800	0
Capitalized software expense	200
Accumulated other comprehensive loss	1,416
Reclassifications out of accumulated other comprehensive loss	$ 0	$ 0