Note F - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	Level 1		Level 2		Level 3		Total at June 30, 2023
Equity Securities	$	25	$	—	$	—	$	25
U.S. Treasury Mutual Funds	$	40,058	$	—	$	—	$	40,058

	Level 1		Level 2		Level 3		Total at December 31, 2022
Equity Securities	$	68	$	—	$	—	$	68
Equity Mutual Fund	$	—	$	16,294	$	—	$	16,294
Commodity Mutual Fund	$	—	$	222	$	—	$	222
U.S. Treasury Mutual Funds	$	17,722	$	—	$	—	$	17,722