Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Held-to-maturity securities, fair value	$ 3,605	$ 3,868
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	350,000	350,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	8,500,000	8,500,000
Common stock, shares issued (in shares)	3,124,053	3,124,053
Treasury stock, shares (in shares)	95,953	108,475