Note 6 - Stockholders' Equity - Schedule of Warrant Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2024	Jun. 30, 2024
Outstanding (in shares)	80
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 72.1
Outstanding, Aggregate Fair Market Value	$ 3,747	$ 3,747
Outstanding, Weighted Average Remaining Contractual Term (Year)	1 year 1 month 6 days	1 year 7 months 6 days
Warrants issued (in shares)	0
Warrants issued, Weighted Average Exercise Price (in dollars per share)	$ 0
Warrants issued, Aggregate Fair Market Value	$ 0
Warrants exercised (in shares)	0
Warrants exercised, Weighted Average Exercise Price (in dollars per share)	$ 0
Warrants exercised, Aggregate Fair Market Value	$ 0
Warrants expired (in shares)	0
Warrants expired,Weighted Average Exercise Price (in dollars per share)	$ 0
Warrants expired, Aggregate Fair Market Value	$ 0
Outstanding (in shares)	80	80
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 72.1	$ 72.1