Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value

Assets measured at fair value on a recurring basis as of December 31, 2019 were as follows (in thousands):

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Money market funds, included in cash equivalents	$	50,242	$	50,242	$	—	$	—
Investments:
Corporate debt securities	48,300		—		48,300		—
U.S. Treasuries	59,082		59,082		—		—
Government agency securities	12,820		—		12,820		—
Totals	$	170,444	$	109,324	$	61,120	$	—

Assets measured at fair value on a recurring basis as of December 31, 2018 were as follows (in thousands):

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Money market funds, included in cash equivalents	$	41,434	$	41,434	$	—	$	—
Investments:
Corporate debt securities	67,843		—		67,843		—
U.S. Treasuries	53,758		53,758		—		—
Government agency securities	32,829		32,829		—		—
Totals	$	195,864	$	128,021	$	67,843	$	—