Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Summary of Assets Measured at Fair Value on Recurring Basis

The following table presents the balances of assets measured at fair value on a recurring basis, by level within the fair value hierarchy, as of the dates presented (in thousands):

	September 30, 2019						December 31, 2018
	Level 1		Level 2		Total		Level 1		Level 2		Total
Cash equivalents:
Money market funds	$	6,393	$	—	$	6,393	$	11,896	$	—	$	11,896
Total cash equivalents		6,393		—		6,393		11,896		—		11,896
Short-term investments:
U.S. government agency securities		—		29,748		29,748		—		7,482		7,482
Corporate notes and bonds		—		10,436		10,436		—		3,736		3,736
Commercial paper		—		5,967		5,967		—		9,943		9,943
Treasury bills		—		—		—		—		17,382		17,382
Total short-term investments		—		46,151		46,151		—		38,543		38,543
Total	$	6,393	$	46,151	$	52,544	$	11,896	$	38,543	$	50,439