Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on Recurring Basis

The following table presents the Company’s assets which were measured at fair value on a recurring basis as of September 30, 2017 and December 31, 2016 (in thousands):

			Fair Value Measurements at Reporting Date Using
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
As of September 30, 2017:
Cash equivalents	$	43,231	$	43,231	$	—	$	—
U.S. Treasury debt securities		25,983		25,983		—		—
Total assets	$	69,214	$	69,214	$	—	$	—
As of December 31, 2016:
Cash equivalents	$	88,609	$	88,609	$	—	$	—
U.S. Treasury debt securities		3,503		3,503		—		—
Total assets	$	92,112	$	92,112	$	—	$	—