CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2023	Dec. 31, 2022
SHAREHOLDERS' EQUITY:
Preferred shares, no par value (in dollars per share)	$ 0	$ 0
Preferred Stock, Shares Authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
Common shares, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	19,000,000	19,000,000
Common stock, shares, issued	14,320,561	14,270,550
Common stock, shares, outstanding (in shares)	11,202,063	11,259,080
Treasury stock, shares	3,118,498	3,011,470