Note 3 - U.S. Treasury Securities, Available-for-sale (Tables)

9 Months Ended

Sep. 30, 2024

Notes Tables

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

(in thousands)
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
September 30, 2024
U.S. Treasury Bill maturing 10/24/2024	$	49,836	$	14	$	-	$	49,850
U.S. Treasury Bill maturing 11/29/2024		49,576		41		-		49,617
	$	99,412	$	55	$	-	$	99,467
December 31, 2023
U.S. Treasury Bill maturing 1/2/2024	$	49,671	$	9	$	-	$	49,680
U.S. Treasury Bill maturing 2/15/2024		49,992		8		-		50,000
U.S. Treasury Bill maturing 4/30/2024		49,140		-		-		49,140
	$	148,803	$	17	$	-	$	148,820