Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares $ / shares in Thousands	Jun. 30, 2024	Dec. 31, 2023
Common Stock, shares authorized (in shares)	3,000,000	3,000,000
Common Stock, no par value (in dollars per share)	$ 0	$ 0
Common Stock, Shares, Issued (in shares)	2,066,044	2,014,283
Common Stock, Shares, Outstanding (in shares)	2,027,032	1,991,337
Treasury stock, shares (in shares)	39,012	22,946