Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Accounts receivable, allowance	$ 7,670	$ 7,670
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	5,019,609	4,962,573
Common stock, shares outstanding (in shares)	5,019,609	4,962,573