Fair Value of Financial Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Summary of Financial Assets and Liabilities Measured at Fair Value Recurring Basis

The following tables present information about the Company’s assets and liabilities that are measured at fair value on a recurring basis (in thousands):

	Fair Value Measurements at December 31, 2019 Using:
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds			$	26,751			$	26,751
Commercial paper				—				—
Total cash equivalents		—		26,751		—		26,751
Marketable securities:
U.S. government securities		—		16,797		—		16,797
Corporate bonds		—		14,060		—		14,060
Commercial paper		—		21,458		—		21,458
Total marketable securities		—		52,315		—		52,315
Total cash equivalents and marketable securities	$	—	$	79,066	$	—	$	79,066

	Fair Value Measurements at December 31, 2018 Using:
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	—	$	22,327	$	—	$	22,327
Commercial paper		—		6,389		—		6,389
Total cash equivalents		—		28,716		—		28,716
Marketable securities:
U.S. government securities		—		37,815		—		37,815
Corporate bonds		—		26,672		—		26,672
Commercial paper		—		16,876		—		16,876
Total marketable securities		—		81,363		—		81,363
Total cash equivalents and marketable securities	$	—	$	110,079	$	—	$	110,079
Liabilities:
Derivative liabilities:
Anti-dilution rights	$	—	$	—	$	223	$	223
	$	—	$	—	$	223	$	223

Summary of Gross Unrealized Gains and Losses of Marketable Securities

The following table summarizes the gross unrealized gains and losses of the Company’s marketable securities as of December 31, 2019 (in thousands):

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Assets:
U.S. government securities	$	16,791	$	6	$	—		$	16,797
Corporate bonds		14,050		12		(2	)		14,060
Commercial paper		21,458		—		—			21,458
	$	52,299	$	18	$	(2	)	$	52,315