FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Financial Instruments Measured at Fair Value

The following table represents the fair value of the Company’s financial instruments, including those measured at fair value on a recurring basis, as of March 31, 2020 and December 31, 2019 as well as those held-to-maturity as of December 31, 2019 (in thousands):

	March 31, 2020								December 31, 2019
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	323,349	$	—	$	—	$	323,349	$	126,700	$	—	$	—	$	126,700
Commercial paper	—		9,981		—		9,981		—		—		—		—
Marketable securities:
Commercial paper	—		86,695		—		86,695		—		130,472		—		130,472
Corporate bonds	—		39,423		—		39,423		—		85,611		—		85,611
Agency bonds	—		—		—		—		—		79,750		—		79,750
Total cash equivalents and marketable securities	$	323,349	$	136,099	$	—	$	459,448	$	126,700	$	295,833	$	—	$	422,533