Business Description and Summary of Significant Accounting Policies (Detail Textuals) - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 78,000		$ 77,000
Inventory reserve	1,525,000		1,513,000
Income taxes paid	165,000	$ 134,000
Interest paid	38,000	$ 36,000
Reclassification of deferred tax liability from current to noncurrent	$ 661,000		$ 661,000