Business Description and Summary of Significant Accounting Policies (Detail Texuals) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Business Description and Summary Of Significant Accounting Policies [Abstract]
Allowance for Doubtful Accounts	$ 134,000		$ 134,000		$ 101,000
Inventory Reserve	574,000		574,000		773,000
Period of inventory expected to be used			1 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	0	291,000	256,000	517,000
Interest paid	12,000	14,000	38,000	44,000
Exercise of stock options, net of income tax benefit	$ 152,000		$ 152,000