Note 2 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

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

		As of March 31, 2025																As of December 31, 2024
						Gross				Gross				Estimated								Gross				Gross				Estimated
						Unrealized				Unrealized				Fair								Unrealized				Unrealized				Fair
		Cost				Gains				Losses				Value				Cost				Gains				Losses				Value
Cash and cash equivalents		$	1,913			$	-			$	-			$	1,913			$	1,961			$	-			$	-			$	1,961
U.S. Governmental agency obligations (unrealized position < 12 months)			3,740				44				(8	)			3,776				4,168				11				(48	)			4,131
U.S. Governmental agency obligations (unrealized position > 12 months)			26,420				27				(2,819	)			23,628				25,944				95				(3,455	)			22,584
		$	32,073			$	71			$	(2,827	)		$	29,317			$	32,073			$	106			$	(3,503	)		$	28,676

Investments Classified by Contractual Maturity Date [Table Text Block]

		*As of*
Maturities:		*March 31, 2025*
One to five years		$	14,771
Five to ten years			13,434
Greater than ten years			1,955
Total		$	30,160

Schedule of Escrow Deposits Sales by Year [Table Text Block]

		*Deposits as of*
Sales		*March 31,*				*December 31,*
Year		*2025*				*2024*
1999		$	211			$	211
2000			1,017				1,017
2001			1,673				1,673
2002			2,271				2,271
2003			4,249				4,249
2004			3,714				3,714
2005			4,553				4,553
2006			3,847				3,847
2007			4,167				4,167
2008			3,364				3,364
2009			1,619				1,619
2010			406				406
2011			193				193
2012			199				199
2013			173				173
2014			143				143
2015			101				101
2016			91				91
2017			82				82
Total		$	32,073			$	32,073