Marketable Debt Securities

12 Months Ended

Dec. 31, 2021

Marketable Debt Securities [Abstract]

Marketable Debt Securities

5. Marketable Debt Securities

Marketable debt securities, all of which were classified as available-for-sale, consist of the following:

	December 31, 2021
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Corporate bonds - presented in marketable debt securities	$	55,548	$	-	$	(43	)	$	55,505
Corporate bonds - presented in marketable debt securities, non-current		39,635		-		(168	)		39,467
Total	$	95,183	$	-	$	(211	)	$	94,972

As of December 31, 2020, the Company did not have any marketable debt securities.

The amount of realized gains and losses reclassified into earnings have not been material to the Company’s consolidated statements of operations. There were no sales of securities in the periods presented.

The contractual maturities of all securities held at December 31, 2020 was 23 months or less. Of the 40 securities in a loss position held by the Company, there were no securities with an other-than-temporary impairment at December 31, 2021. There were no securities in a continuous unrealized loss position for greater than twelve months at December 31, 2021.

Investment Income

Investment income consists of the following:

	December 31,
	2021			2020
Interest income	$	1,974		$	500
Accretion/(amortization) of discount/premium, net		(1,737	)		-
Total interest and investment income	$	237		$	500