Property, Plant and Equipment (Detail Textuals) - USD ($)	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]
Accumulated depreciation	$ 16,200,000		$ 16,200,000		$ 15,600,000
Depreciation and amortization expense	198,000	$ 185,000	610,000	$ 525,000
ATG
Property, Plant and Equipment [Line Items]
Construction in progress	64,000		64,000		57,000
Facilities
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ 3,418,000		$ 3,418,000		$ 3,258,000