Note 5 - Investments (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Investment [Table Text Block]

	Cost or Adjusted/ Amortized Costs		Gross Unrealized Gains		Gross Unrealized Losses		Total
U.S. government and agency securities, held-to-maturity	$	4,314	$	-	$	-	$	4,114
Investment in limited partnership		1,000						1,000
Common stock		250		-		-		250
Total investments	$	5,564	$	-	$	-	$	5,564

Investments Classified by Contractual Maturity Date [Table Text Block]

	Cost or Amortized Cost		Percent of Total			Fair Value		Percent of Total
Due in one year or less	$	-		-	%	$	-		-	%
Due after one year through five years		4,314		100.0			4,314		100.0
Due after five years through ten years		-		-			-		-
Due after ten years		-		-			-		-
Total	$	4,313		100.0	%	$	4,313		100.0	%

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

	Total		Level 1		Level 2		Level 3
Common stock	$	250	$	-	$	-	$	250
Investment in limited partnership		1,000						1,000
Investments, at fair value		1,250						1,250
U.S. government and agency securities, held-to-maturity		4,314		-		-		-
Total investments	$	5,564	$	-	$	-	$	1,250

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

	Investment in Common		Investment in Limited Partnership		Total
Purchases	$	250	$	1,000	$	1,250-
Total investments	$	250	$	1,000	$	1,250