Investments (Tables)

3 Months Ended

Mar. 31, 2021

Investments [Abstract]

Cost And Estimated Fair Value Of Investments

	Cost		Gross unrealized gain		Gross unrealized loss			Fair value
March 31, 2021
Commercial Paper	$	719	$	0	$	0		$	719
Treasury Bills		7,998		2		0			8,000
Equity Securities		54		0		(12	)		42
		8,771		2		(12	)		8,761
Less Cash Equivalents		719		0		0			719
Total Investments, March 31, 2021	$	8,052	$	2	$	(12	)	$	8,042
December 31, 2020
Commercial Paper	$	718	$	0	$	0		$	718
Treasury Bills		7,998		1		0			7,999
Equity Securities		54		0		(12	)		42
		8,770		1		(12	)		8,759
Less Cash Equivalents		718		0		0			718
Total Investments, December 31, 2020	$	8,052	$	1	$	(12	)	$	8,041