Business Description and Summary of Significant Accounting Policies (Detail Textuals) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Business Description and Summary Of Significant Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 130,000	$ 101,000
Inventory reserve	778,000	773,000
Period of inventory expected to be used	greater than one year
Period of exceeding customer requirements of purchase quantities	1 year
Period of purchase of other products support items to maintain lead time and larger quantity	1 year
Income taxes paid	256,000	511,000
Interest paid	57,000	65,000
Exercise of stock options, net of income tax benefit	$ 213,000	$ 283,000