Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Mar. 31, 2023	Jun. 30, 2022
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	45,000,000	45,000,000
Common stock, shares issued (in shares)	7,306,718	6,860,420
Common stock, shares outstanding (in shares)	7,306,718	6,769,923
Treasury stock, sharesTreasury stock, shares (in shares)	0	90,497