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Note 8 - Stockholders' Equity (Details Textual) - USD ($)						12 Months Ended
	Feb. 26, 2026	Jan. 26, 2026	Dec. 19, 2025	Dec. 18, 2024	Sep. 30, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 202
Treasury Stock, Common, Shares (in shares)						115,211	121,166
Treasury Stock, Common, Value						$ 216,343	$ 222,435
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			19,500	19,250		19,500	19,250
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value			$ 27,275	$ 33,039
Subsequent Event [Member] \| S 2026 Q1 Dividends [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)		$ 0.1
Subsequent Event [Member] \| O 2026 Q1 Dividends [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.02
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)					703
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount					$ 2,700
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)						39,500	60,500
Share-Based Payment Arrangement, Expense						$ 77,909	$ 77,909
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount						76,344		$ 154,252
Share-Based Payment Arrangement, Expense						$ 27,274	$ 44,532
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						3 years