Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Property, plant and equipment
Leased assets, net	$ 8,429		$ 8,429		$ 8,191
Accumulated depreciation	2,519		2,519		1,847
Depreciation and amortization	492	$ 445	771	$ 1,066
Sale Leaseback Agreement
Property, plant and equipment
Leased assets, net	14,800		14,800		15,400
Accumulated depreciation	1,000		1,000		$ 439
Depreciation and amortization	263		527
Property, Plant and Equipment
Property, plant and equipment
Depreciation and amortization related to property, plant and equipment	361	394	678	963
Cost of Goods Sold
Property, plant and equipment
Depreciation included in cost of sales	$ 141	$ 109	$ 282	$ 158