Cash and Cash Equivalents and Short-Term Investments (Tables)

3 Months Ended

Mar. 31, 2020

Cash and Cash Equivalents [Abstract]

Summary of amortized cost, unrealized gain and loss and estimated fair value

The following tables summarize the amortized cost, unrealized gain and loss and estimated fair value of cash equivalents and short-term investments:

	March 31, 2020
(in thousands)	Amortized Cost		Unrealized Gain		Unrealized Loss			Estimated Fair Value
Cash equivalents:
Money market funds	$	40,395	$	—	$	—		$	40,395
Total cash equivalents	$	40,395	$	—	$	—		$	40,395
Short-term investments:
Commercial paper	$	52,984	$	—	$	—		$	52,984
Corporate bonds	20,775		6		(109		)	20,672
U.S. Treasury and agency obligations	45,002		266		—			45,268
Total short-term investments	$	118,761	$	272	$	(109	)	$	118,924

	December 31, 2019
(in thousands)	Amortized Cost		Unrealized Gain		Unrealized Loss			Estimated Fair Value
Cash equivalents:
Money market funds	$	13,588	$	—	$	—		$	13,588
Commercial paper	8,987		—		—			8,987
Total cash equivalents	$	22,575	$	—	$	—		$	22,575
Short-term investments:
Commercial paper	$	61,371	$	—	$	—		$	61,371
Corporate bonds	23,856		14		(1		)	23,869
U.S. Treasury and agency obligations	52,627		38		(1		)	52,664
Total short-term investments	$	137,854	$	52	$	(2	)	$	137,904