Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Accounts receivable, allowance (in Dollars)	$ 29,000	$ 18,000
Common stock, par value (in Dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	4,596,439	4,596,439
Common stock, shares outstanding	4,596,439	4,596,439