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Note 3 - Investments and Restricted Investments (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

Schedule of Available for Sale Securities, and Held to Maturity [Table Text Block]

		*March 31, 2025*
		*Amortized Cost*				*Gross Unrealized Gains*				*Gross Unrealized Losses*				*Estimated Fair Value*
Investments, available for sale:
U.S. Treasuries		$	-			$	-			$	-			$	-
Total investments		$	-			$	-			$	-			$	-

Restricted investments, held-to-maturity:
U.S. Treasuries			13,814				108				(216	)			13,706
Total restricted investments		$	13,814			$	108			$	(216	)		$	13,706

		*December 31, 2024*
		*Amortized Cost*				*Gross Unrealized Gains*				*Gross Unrealized Losses*				*Estimated Fair Value*
Investments, available for sale:
U.S. Treasuries		$	18,934			$	53			$	-			$	18,987
Total investments		$	18,934			$	53			$	-			$	18,987

Restricted investments, held-to-maturity:
U.S. Treasuries			13,816				85				(353	)			13,548
Total restricted investments		$	13,816			$	85			$	(353	)		$	13,548

Investments Classified by Contractual Maturity Date [Table Text Block]

		Investments				Restricted Investments
Due within one year		$	-			$	2,356
Due one year through five years			-				11,458
Total		$	-			$	13,814