Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Schedule of Fair Value Measurement

The following tables represent the financial instruments measured at fair value on a recurring basis in the financial statements of the Company and the valuation approach applied to each class of financial instruments at September 30, 2019 and December 31, 2018 (in thousands):

	September 30, 2019
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Cash and cash equivalents:
Money market funds	$	69,750	$	—	$	—	$	69,750
Total cash and cash equivalents	$	69,750	$	—	$	—	$	69,750
Investments:
Certificates of deposit	—		4,183		—		4,183
U.S. Treasury securities	12,001		—		—		12,001
U.S. Agency securities	—		1,505		—		1,505
Asset-backed securities	—		1,107		—		1,107
Corporate notes and bonds	—		10,182		—		10,182
Total investments	12,001		16,977		—		28,978
Total assets measured at fair value	$	81,751	$	16,977	$	—	$	98,728

	December 31, 2018
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Cash and cash equivalents:
Money market funds	$	38,444	$	—	$	—	$	38,444
Commercial paper	—		1,493		—		1,493
Total cash and cash equivalents	38,444		1,493		—		39,937
Investments:
Certificates of deposit	—		10,787		—		10,787
U.S. Treasury securities	22,120		—		—		22,120
U.S. Agency securities	—		7,980		—		7,980
Commercial paper	—		17,025		—		17,025
Asset-backed securities	—		11,998		—		11,998
Corporate notes and bonds	—		30,308		—		30,308
Total investments	22,120		78,098		—		100,218
Total assets measured at fair value	$	60,564	$	79,591	$	—	$	140,155