Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Measurements

Summary of major categories of financial assets and liabilities measured at fair value on a recurring basis

The following fair value hierarchy table presents information about each major category of our financial assets and liabilities measured at fair value on a recurring basis (in thousands):

	Level 1		Level 2		Level 3		Total
June 30, 2018
Assets
Money market funds (cash equivalents)	$	10,595	$	—	$	—	$	10,595
U.S. Treasury securities		—		24,902		—		24,902
Total assets	$	10,595	$	24,902	$	—	$	35,497
December 31, 2017
Assets
Money market funds (cash equivalents)	$	33,531	$	—	$	—	$	33,531
U.S. Treasury securities		—		24,825		—		24,825
Total assets	$	33,531	$	24,825	$	—	$	58,356