Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2024

Summary of Significant Accounting Policies [Abstract]

Fair Value of Investments

The following tables show cost and estimated fair value of the assets held in the MSA account, respectively, as well as the maturities of the U.S. Governmental agency obligations held in such account for the periods indicated.

	As of March 31, 2024							As of December 31, 2023
			Gross			Estimated				Gross			Estimated
			Unrealized			Fair				Unrealized			Fair
	Cost		Gains (Losses)			Value		Cost		Losses			Value
Cash and cash equivalents	$	1,934	$	–		$	1,934	$	1,929	$	–		$	1,929
U.S. Governmental agency obligations (unrealized position < 12 months)		1,196		6			1,202		–		–			–
U.S. Governmental agency obligations (unrealized position > 12 months)		28,943		(3,652	)		25,291		30,144		(3,389	)		26,755
	$	32,073	$	(3,646	)	$	28,427	$	32,073	$	(3,389	)	$	28,684

Maturities of U.S. Governmental Agency Obligations

	As of
	March 31, 2024
Less than one year	$	3,250
One to five years		13,775
Five to ten years		11,159
Greater than ten years		1,955
Total	$	30,139

Deposits by Sales Year for MSA Escrow Account

The following shows the amount of deposits by sales year for the MSA escrow account:

	Deposits as of
Sales Year	March 31, 2024		December 31, 2023
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