Consolidated Balance Sheets (Parentheticals) - $ / shares $ / shares in Thousands	Jun. 30, 2024	Jun. 30, 2023
Preferred Shares, Authorized (in shares)	200,000	200,000
Preferred Shares, Issued (in shares)	0	0
Preferred Shares, No Par Value (in dollars per share)	$ 0	$ 0
Common shares, authorized (in shares)	30,000,000	30,000,000
Common shares, shares issued (in shares)	14,632,802	14,632,802
Common shares, no par value (in dollars per share)	$ 0	$ 0
Treasury Stock, Common, Shares (in shares)	637,778	814,734