Business Description and Summary of Significant Accounting Policies (Detail Textuals) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Business Description and Summary Of Significant Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 112,000			$ 112,000		$ 130,000
Inventory reserve	734,000			734,000		778,000
Income taxes paid	0		248,500	2,700	256,000
Interest paid	11,000		14,000	21,000	27,000
Exercise of stock options, net of income tax benefit		$ 21,000