Fair Value (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities Measured at Fair Value on 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):

	Fair Value Measurement at December 31, 2017
	Fair Value		Level 1		Level 2		Level 3
Assets
Money market funds	$	55,245	$	55,245	$	—	$	—

	Fair Value Measurement at December 31, 2016
	Fair Value		Level 1		Level 2		Level 3
Assets
Money market funds	$	57,715	$	57,715	$	—	$	—