Investments (Tables)

3 Months Ended

Mar. 31, 2022

Investments [Abstract]

Cost And Estimated Fair Value Of Investments

	Cost		Gross unrealized gain		Gross unrealized loss		Fair value
March 31, 2022
Commercial Paper	$	1,324	$	0	$	0	$	1,324
Treasury Bills		7,996		1		0		7,997
Equity Securities		54		2		0		56
		9,374		3		0		9,377
Less Cash Equivalents		7,321		0		0		7,321
Total Investments, March 31, 2022	$	2,053	$	3	$	0	$	2,056
December 31, 2021
Commercial Paper	$	1,520	$	0	$	0	$	1,520
Treasury Bills		8,000		0		0		8,000
Equity Securities		54		2		0		56
		9,574		2		0		9,576
Less Cash Equivalents		6,520		0		0		6,520
Total Investments, December 31, 2021	$	3,054	$	2	$	0	$	3,056