Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Measurements

Schedule of assets and liabilities measured and recorded in financial statements at fair value on a recurring basis

	September 30, 2018
(In thousands)	Total		Level 1		Level 2		Level 3
Assets
Money market funds	$	17,746	$	17,746	$	—	$	—
Total assets	$	17,746	$	17,746	$	—	$	—
Total liabilities	$	—	$	—	$	—	$	—
	December 31, 2017
(In thousands)	Total		Level 1		Level 2		Level 3
Assets
Money market funds	$	66,183	$	66,183	$	—	$	—
Total assets	$	66,183	$	66,183	$	—	$	—
Total liabilities	$	—	$	—	$	—	$	—