Note 11 - Subsequent Events (Details Textual) - USD ($)	3 Months Ended
	Sep. 30, 2023	Aug. 18, 2023
Employee Severance [Member] | Forecast [Member]
Payments for Restructuring	$ 1,200,000
Employee Severance [Member] | Subsequent Event [Member]
Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date Percent		70.00%
Restructuring and Related Cost, Expected Cost		$ 900,000
Previously Accrued Paid Time Off [Member] | Forecast [Member]
Restructuring and Related Cost, Expected Cost	$ 300,000