Investments (Tables)

12 Months Ended

Dec. 31, 2020

Investments

Schedule of investments, held-to-maturity securities

Held-to-Maturity Bonds
Credit Quality Indicators	Asset Backed Bonds		Fed Govt. Bonds/Notes		Municipal Bonds		Corporate Bonds		Totals
AAA/AA/A	$	1,413	$	3,222	$	637	$	32,126	$	37,398
BBB/BB		-		-		-		18,322		18,322
TOTAL	$	1,413	$	3,222	$	637	$	50,448	$	55,720

Schedule of unrealized gains and losses

	Gross Unrealized
	Level		Cost		Gains		Losses			Fair Value
As of December 31, 2020:
Money market funds		1		4,822	$	—	$	—		$	4,822
Commercial paper		2		6,178	$	—	$	—		$	6,178
Bonds		2		55,720	$	505	$	(44	)	$	56,181
Mutual funds		1		599	$	—	$	(36	)	$	563
Equity investments		2		5,675	$	—	$	(1,598	)	$	4,077
As of December 31, 2019:
Money market funds		1		3,460	$	—	$	—		$	3,460
Commercial paper		2		9,424	$	2	$	—		$	9,426
Bonds		2		44,833	$	138	$	(19	)	$	44,952
Mutual funds		1		1,052	$	53	$	—		$	1,105
Equity investments		2		5,675	$	—	$	(2,853	)	$	2,822