Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Measurements [Abstract]

Schedule of fair value measurement on a recurring basis

March 31, 2023

	Carrying amount				Fair Value Measurement Using
	in balance sheet		Fair Value		Level 1		Level 2		Level 3
Assets:
Cash equivalents
Money Market Savings	$	1,316	$	1,316	$	1,316	$	0	$	0
Treasury bills		3,986		3,986		3,986		0		0
Treasury bills - maturity date greater than three months		3,967		3,967		3,967		0		0
Equity Securities		56		56		0		0		56

December 31, 2022

	Carrying amount				Fair Value Measurement Using
	in balance sheet		Fair Value		Level 1		Level 2		Level 3
Assets:
Cash equivalents
Commercial paper	$	1,377	$	1,377	$	1,377	$	0	$	0
Treasury bills		5,974		5,974		5,974		0		0
Treasury bills - maturity date greater than three months		1,980		1,980		1,980		0		0
Equity Securities		56		56		0		0		56

Summary of change in level 3 assets at fair value on a recurring basis

	Three Months Ended March 31,
	2023		2022
Beginning Balance	$	56	$	56
Change in Fair Value		0		0
Ending Balance	$	56	$	56