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

12 Months Ended

Dec. 31, 2025

Notes Tables

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

(in thousands)
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
December 31, 2025
U.S. Treasury Note, 4.625%, 6/30/2026 Maturity	$	100,136	$	395	$	-	$	100,531
U.S. Treasury Note, 0.75%, 5/31/2026 Maturity		34,579		23		-		34,602
	$	134,715	$	418	$	-	$	135,133
December 31, 2024
U.S. Treasury Note, 4.625%, 6/30/2026 Maturity	$	100,412	$	139	$	-	$	100,551
	$	100,412	$	139	$	-	$	100,551