Commitments and Contingencies (Detail Textuals) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Post retirement obligation	$ 1,007,000	$ 1,007,000
Arbitration-related expense	$ 367,000	270,000
Employment Agreement
Loss Contingencies [Line Items]
Minimum age limit	65 years
Term of maintaining employment level	5 years
Employment Agreement | Kenneth Trbovich
Loss Contingencies [Line Items]
Post retirement obligation	$ 764,000	$ 736,000
CPG
Loss Contingencies [Line Items]
Amount of grant received from Cattaraugus County, New York	$ 300,000