Property, Plant and Equipment (Detail Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Accumulated amortization	$ 15,600,000	$ 14,909,000
Depreciation and amortization expense	718,000	652,000
Construction in progress	57,000	2,817,000
Consumer Products Group
Property, Plant and Equipment [Line Items]
Construction in progress		2,529,000
Advanced Technology Group
Property, Plant and Equipment [Line Items]
Construction in progress	57,000	288,000
Land and building | Elma
Property, Plant and Equipment [Line Items]
Nominal amount of capital lease	5,000,000
Buildings
Property, Plant and Equipment [Line Items]
Accumulated amortization	$ 2,937,000	$ 2,811,000