Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Summary of Financial Assets and Liabilities Subject to Fair Value Measurements on Recurring Basis and Level of Inputs Used in Measurements

The Company’s financial assets and liabilities subject to fair value measurements on a recurring basis and the level of inputs used in such measurements were as follows (in thousands):

	September 30, 2020
	Total		Level 1		Level 2		Level 3
Assets:
Cash equivalents:
Money market funds	$	28,832	$	28,832	$	—	$	—
U.S. treasuries		9,999		—		9,999		—
Total cash equivalents		38,831		28,832		9,999		—
Short-term marketable securities:
U.S. and foreign commercial paper		13,743		—		13,743		—
U.S. and foreign corporate debt securities		8,592		—		8,592		—
U.S. government debt securities		20,924		—		20,924		—
U.S. treasuries		40,374		—		40,374		—
Total short-term marketable securities		83,633		—		83,633		—
Total assets subject to fair value measurements    on a recurring basis	$	122,464	$	28,832	$	93,632	$	—

	December 31, 2019
	Total		Level 1		Level 2		Level 3
Assets:
Cash equivalents:
Money market funds	$	29,377	$	29,377	$	—	$	—
U.S. and foreign commercial paper		4,999		—		4,999		—
U.S government debt securities		2,550		—		2,550		—
Total cash equivalents		36,926		29,377		7,549		—
Short-term marketable securities:
U.S. treasuries		15,063		—		15,063		—
U.S. and foreign commercial paper		11,972		—		11,972		—
U.S. and foreign corporate debt securities		8,755		—		8,755		—
U.S. government debt securities		48,718		—		48,718		—
Total short-term marketable securities		84,508		—		84,508		—
Strategic investment
Foreign equity securities		5,507		5,507		—		—
Total strategic investment		5,507		5,507		—		—
Long-term marketable securities
U.S. treasuries		3,025		—		3,025		—
Total long-term marketable securities		3,025		—		3,025		—
Total assets subject to fair value measurements    on a recurring basis	$	129,966	$	34,884	$	95,082	$	—
Liabilities:
Contingent consideration liability	$	1,131	$	—	$	—	$	1,131
Total liabilities subject to fair value    measurements on a recurring basis	$	1,131	$	—	$	—	$	1,131

Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Text Block]

The following table provides a reconciliation of the Company’s financial liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) at September 30, 2020 and 2019 (in thousands):

	Amount
Balance at December 31, 2019	$	1,131
Additions		—
Settlements		(1,098	)
Change in fair value		(33	)
Balance at September 30, 2020	$	—

	Amount
Balance at December 31, 2018	$	2,483
Additions		—
Settlements		—
Change in fair value		(1,327	)
Balance at September 30, 2019	$	1,156