Short-Term Investments (Tables)

12 Months Ended

Dec. 31, 2021

Investments Debt And Equity Securities [Abstract]

Schedule of Company's Short-Term Investments

The following table summarizes the Company’s short-term investments (in thousands):

	Maturity	Amortized		Unrealized		Unrealized			Estimated
	(in years)	Cost		Gains		Losses			Fair Value
December 31, 2021
U.S. treasury securities	1 or less	$	17,122	$	-	$	(7	)	$	17,115
U.S. treasury securities	>1 and <5		12,049		-	$	(43	)	$	12,006
Certificates of deposit	1 or less		1,226		-		(2	)		1,224
Total		$	30,397	$	-	$	(52	)	$	30,345
December 31, 2020
U.S. treasury securities	1 or less	$	56,218	$	6	$	(4	)	$	56,220
Certificates of deposit	1 or less		1,955		6		-			1,961
Total		$	58,173	$	12	$	(4	)	$	58,181