Business Description and Summary of Significant Accounting Policies (Detail Textuals) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 149,000		$ 149,000
Inventory reserve	1,622,000		$ 1,601,000
Interest paid	$ 25,000	$ 22,000