Property, Plant and Equipment (Detail Textuals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ 15,411		$ 15,411		$ 14,909
Depreciation and amortization expense	185	$ 150	525	$ 490
CPG
Property, Plant and Equipment [Line Items]
Construction in progress	431		431		2,529
Construction in progress placed in service	2,800		2,800
ATG
Property, Plant and Equipment [Line Items]
Construction in progress	178		178		288
Land and building | Elma
Property, Plant and Equipment [Line Items]
Nominal amount of capital lease	5,000		5,000
Buildings
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ 2,907		$ 2,907		$ 2,811