Note 13 - Subsequent Events (Details Textual) - USD ($)			3 Months Ended	6 Months Ended
	Aug. 09, 2023	Aug. 02, 2023	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022	Mar. 17, 2023
Proceeds from Issuance of Common Stock				$ 56,266	$ 0
Gray Matters [Member]
Disposal Group, Including Discontinued Operation, Percentage of Equity Sold						75.10%
Subsequent Event [Member]
Equity Method Investment, Realized Gain (Loss) on Disposal	$ 382,525
Investment Owned, Net Assets, Percentage	0.00%
Subsequent Event [Member] | GMDC [Member]
Proceeds from Sale of Equity Method Investments	$ 1,400,000
Subsequent Event [Member] | GMI Subsidiary [Member]
Proceeds From Setllement of Contingent Consideration Receivable	1,000,000
Common Stock Purchase Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)			0
Common Stock Purchase Agreement [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)		200,000
Shares Issued, Price Per Share (in dollars per share)		$ 0.59
Shares Issued, Fees Per Share (in dollars per share)		$ 0.03
Proceeds from Issuance of Common Stock		$ 118,655
Common Stock [Member] | Subsequent Event [Member] | GMDC [Member]
Proceeds from Sale of Equity Method Investments	$ 400,000