Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ / shares in Thousands, $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Inventories, LIFO reserves	$ 12,043	$ 20,301
Preferred Stock, par value (in dollars per share)	$ 0	$ 0
Preferred Stock, shares authorized (in shares)	5,000	5,000
Preferred Stock, shares issued (in shares)	0	0
Preferred Stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	20,000	20,000
Common stock, shares issued (in shares)	11,133	11,130
Common stock, shares outstanding (in shares)	11,133	11,130