Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

Assets Measured at Fair Value on a Recurring Basis as of June 30, 2020

	Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)		Significant Unobservable  Inputs (Level 3)		Balance as of June 30, 2020
	(in thousands, unaudited)
Assets
Cash equivalents	$	21,492	$	—	$	—	$	21,492
Total	$	21,492	$	—	$	—	$	21,492

Assets Measured at Fair Value on a Recurring Basis as of December 31, 2019

	Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)		Significant Unobservable  Inputs (Level 3)		Balance as of December 31, 2019
	(in thousands)
Assets
Cash equivalents	$	44,751	$	—	$	—	$	44,751
Total	$	44,751	$	—	$	—	$	44,751