Note 2 - Significant Accounting Policies - Antidilutive Securities (Details) - shares	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Antidilutive securities (in shares)	1,968,748	105,051
Restricted Stock Units (RSUs) [Member]
Antidilutive securities (in shares)	235,851	1,311
Warrant [Member]
Antidilutive securities (in shares)	1,476,200	81,043
Share-Based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)	256,474	22,474
Class A Preferred Shares [Member]
Antidilutive securities (in shares)	223	223