Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Summary of Cash and Cash Equivalents, Money Market Funds and Short-term Investments by Significant Investment Category

The following tables show the Company’s cash equivalents Money Market Funds and short-term investments by significant investment category (in thousands):

	As of December 31, 2020
	Adjusted Cost		Unrealized Gains		Unrealized Losses			Market Value
Level 1:
Money Market Funds	$	27,686	$	—	$	—		$	27,686
Level 2:
U.S. Treasury securities included in cash and cash equivalents and short-term investments		63,101		4		(1	)		63,104
U.S. government agency securities included in short-term investments		54,183		10		—			54,193
Corporate debt securities included in cash and    cash equivalents and short-term investments		118,759		1		(46	)		118,714
Total financial assets	$	263,729	$	15	$	(47	)	$	263,697

	As of December 31, 2019
	Adjusted Cost		Unrealized Gains		Unrealized Losses			Market Value
Level 1:
Money Market Funds	$	16,366	$	—	$	—		$	16,366
Level 2:
U.S. Treasury securities included in short-term investments		2,998		—		—			2,998
U.S. government agency securities included in    short-term investments		34,204		1		(2	)		34,203
Total financial assets	$	53,568	$	1	$	(2	)	$	53,567

Summery of Remaining Contractual Maturities of Company’s Short-term Investments

The following summarizes the remaining contractual maturities of the Company’s short-term investments as of December 31, 2020:

	Adjusted Cost		Market Value
Mature in 1 year or less	$	220,980	$	220,946
Mature in 1 to 2 years		5,064		5,066
Total	$	226,044	$	226,012