Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements

The following tables summarize the fair value of financial assets and liabilities that are measured at fair value and the classification by level of input within the fair value hierarchy:

	FAIR VALUE MEASUREMENTS AS OF
	DECEMBER 31, 2019
(in thousands)	LEVEL 1		LEVEL 2		LEVEL 3		TOTAL
Cash and cash equivalents:
Cash and cash equivalents	$	133,931	$	10,009	$	—	$	143,940
Total cash and cash equivalents:	$	133,931	$	10,009	$	—	$	143,940
Investments:
Commercial paper	$	—	$	64,622	$	—	$	64,622
Corporate bonds	—		60,564		—		60,564
U.S. government and government agencies	—		40,064		—		40,064
Total investments	$	—	$	165,250	$	—	$	165,250
Total cash, cash equivalents and investments:	$	133,931	$	175,259	$	—	$	309,190

	FAIR VALUE MEASUREMENTS AS OF
	DECEMBER 31, 2018
(in thousands)	LEVEL 1		LEVEL 2		LEVEL 3		TOTAL
Cash and cash equivalents:
Cash and cash equivalents	$	202,818	$	—	$	—	$	202,818
Total cash and cash equivalents:	$	202,818	$	—	$	—	$	202,818