Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Assets and liabilities that are measured at fair value on a recurring basis

The following tables set forth our assets that are measured at fair value on a recurring basis at December 31, 2018 and 2017:

	December 31, 2018
(in thousands)	Total		Level 1		Level 2		Level 3
Cash equivalents	$	1,007	$	1,007	$	—	$	—

	December 31, 2017
(in thousands)	Total		Level 1		Level 2		Level 3
Cash equivalents	$	69,480	$	69,480	$	—	$	—