Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Summary of Assets that Require Fair Value Measurements on Recurring Basis and Their Respective Input Levels Based on Fair Value Hierarchy

The following tables summarize the Company’s assets that require fair value measurements on a recurring basis and their respective input levels based on the fair value hierarchy (in thousands):

			Fair Value Measurements Using
			Quoted Prices in		Significant		Significant
			Active Markets		Other		Unobservable
	September 30,		for Identical		Observable		Inputs
	2020		Assets (Level 1)		Inputs (Level 2)		(Level 3)
Short-term investments:
U.S. treasury securities	$	37,119	$	37,119	$	-	$	-
Certificates of deposit		4,169		4,169		-		-
Total	$	41,288	$	41,288	$	-	$	-

			Fair Value Measurements Using
			Quoted Prices in		Significant		Significant
			Active Markets		Other		Unobservable
	December 31,		for Identical		Observable		Inputs
	2019		Assets (Level 1)		Inputs (Level 2)		(Level 3)
Short-term investments:
U.S. treasury securities	$	28,549	$	28,549	$	-	$	-
Agency securities		5,994		-		5,994		-
Certificates of deposit		5,381		5,381		-		-
Total	$	39,924	$	33,930	$	5,994	$	-