Note 5 - Stockholders' Equity (Details Textual) - $ / shares			15 Months Ended
	Dec. 31, 2021	Dec. 21, 2021	Sep. 30, 2022	Jun. 30, 2022
Preferred Stock, Shares Issued, Total (in shares)			280,898	280,898
Equity Securities, Notice of Deficiency, Failure to Maintain Minimum Bid Price, Amount (in dollars per share)		$ 1.00
Equity Securities, Minimum Closing Bid Price (in dollars per share)	$ 1.00	$ 1.00
Equity Securities, Threshold Consecutive Trading Days (Day)	10 days	10 days
Series D Preferred Stock [Member]
Preferred Stock, Shares Issued, Total (in shares)			280,898
Preferred Stock, Conversion Basis			1