Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Accounts receivable, allowance (in Dollars)	$ 29,000	$ 29,000
Common stock, par value (in Dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in Shares)	10,000,000	10,000,000
Common stock, shares issued (in Shares)	4,596,439	4,596,439
Common stock, shares outstanding (in Shares)	4,596,439	4,596,439