Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 781	$ 920	$ 2,430	$ 2,228
Depreciation expense	296	391	940	631
Amortization of intangibles	(169)	(52)	(539)	(155)
Leased assets, net	3,382		3,382		$ 5,387
Accumulated amortization of leased assets	2,745		2,745		2,264
Proceeds from the sale of property, plant and equipment			327	1,171
Gain (loss) on sale of assets, excluding deferred gain recognized	(642)	490
Gain (loss) on sale of assets			(613)	489
Sale Leaseback Agreement
Property, Plant and Equipment [Line Items]
Depreciation expense	316	477	951	1,400
Depreciation and amortization related to capital leased assets included in cost of sales	141		423
Leased assets, net	14,200		14,200		14,700
Accumulated amortization of leased assets	2,600		2,600		$ 1,600
CFI NNN Raiders | Capital Lease Obligations | Sale Leaseback Agreement
Property, Plant and Equipment [Line Items]
Depreciation and amortization	263	263	790	790
Amortization related to deferred gain recognized from sale of real estate	$ 42	$ 42	$ 126	$ 126