Note 2 - Summary of Significant Accounting Policies - Potentially Dilutive Common Shares (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Potentially Dilutive Common Shares (in shares)	6,301,500		10,454,812		6,301,500	10,454,812
Net income (loss)	$ 109,535	$ (92,805)	$ (158,511)	$ (3,923)	$ 16,730	$ (162,434)
Basic weighted average shares (in shares)	68,104,957		68,104,957		68,104,957	68,104,957
Denominator for diluted income (loss) per share-adjusted weighted average shares after assumed conversions (in shares)	72,258,269		68,104,957		72,258,269	68,104,957
Series C Convertible Preferred Stock [Member]
Convertible Preferred Stock (in shares)	524,736		0		524,736	0
Series D Convertible Preferred Stock [Member]
Convertible Preferred Stock (in shares)	3,628,576		0		3,628,576	0
Share-Based Payment Arrangement, Option [Member]
Potentially Dilutive Common Shares (in shares)	6,301,500		6,301,500		6,301,500	6,301,500
Series C Convertible Preferred Stock [Member]
Potentially Dilutive Common Shares (in shares)	0		524,736		0	524,736
Series D Convertible Preferred Stock [Member]
Potentially Dilutive Common Shares (in shares)	0		3,628,576		0	3,628,576