Note 9 - Convertible Note Payable (Details Textual) - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 22, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Mar. 31, 2023
Class of Warrant or Right, Issued During Period (in shares)		0	0	0	0
Warrants Issued in Connection With Note [Member]
Class of Warrant or Right, Issued During Period (in shares)	200,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 3.00
The Note [Member]
Debt Instrument, Face Amount		$ 2,200,000		$ 2,200,000		$ 2,200,000
Debt Instrument, Fair Value Disclosure		2,498,780		2,498,780		2,596,203
The Note [Member] | Senior Secured Promissory Note [Member]
Debt Instrument, Face Amount	$ 2,200,000	$ 2,200,000		$ 2,200,000		$ 2,200,000
Proceeds from Debt, Net of Issuance Costs	$ 2,002,000
Debt Instrument, Interest Rate, Stated Percentage	10.00%	12.00%		12.00%			10.00%
Stock Issued During Period, Shares, Commitment Fee (in shares)	700,000
Shares Issued, Price Per Share (in dollars per share)	$ 1.00
Debt Instrument, Interest Rate, Default	18.00%	18.00%		18.00%		18.00%
Debt Instrument, Default, Percentage Increase In Principal	30.00%			30.00%		30.00%
Debt Instrument, Convertible, Number of Equity Instruments	1,684,576
Debt Instrument, Convertible, Percentage of Outstanding Stock	19.90%