Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2023	Jun. 30, 2023
Allowance for credit losses	$ 546	$ 449
Class A Common Shares
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares, outstanding (in shares)	6,953,641	6,853,673
Common stock, shares, issued (in shares)	8,361,535	8,361,535
Class B Common Shares
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares, outstanding (in shares)	551,564	576,396
Common stock, shares, issued (in shares)	852,825	852,825