Short-Term Investments (Tables)

3 Months Ended

Mar. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Summary of Estimated Fair Value of Short-Term Investments

The following represents a summary of the estimated fair value of short-term investments as of March 31, 2020 and December 31, 2019 (in thousands):

At March 31, 2020	Maturity (in years)	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value
Available-for-sale securities:
Commercial paper	Less than 1	$	17,352	$	11	$	—		$	17,363
U.S. Government-sponsored enterprise	Less than 2	20,255		63		—			20,318
U.S. Treasury securities	Less than 1	12,721		93		—			12,814
Corporate debt securities	Less than 2	35,251		39		(62		)	35,228
Total		$	85,579	$	206	$	(62	)	$	85,723

At December 31, 2019	Maturity (in years)	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value
Available-for-sale securities:
Commercial paper	Less than 1	$	24,147	$	10	$	—		$	24,157
U.S. Government-sponsored enterprise	Less than 2	33,073		26		—			33,099
U.S. Treasury securities	Less than 2	17,963		17		(1		)	17,979
Corporate debt securities	Less than 2	50,011		42		(5		)	50,048
Total		$	125,194	$	95	$	(6	)	$	125,283