Note 7 - Stockholders' Equity - Fair Value Valuation (Details)	Jun. 30, 2023
Measurement Input, Conversion Price Before [Member]
Conversion price before	6.30
Measurement Input, Conversion Price [Member]
Conversion price before	2.65
Measurement Input, Expected Term [Member]
Conversion price before	4.9
Measurement Input, Price Volatility [Member]
Conversion price before	1.23
Measurement Input, Expected Dividend Rate [Member]
Conversion price before	0
Measurement Input, Risk Free Interest Rate [Member]
Conversion price before	0.0420