Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Stock-Based Compensation

Stock-based compensation expense

	Three months ended June 30,				Six months ended June 30,
	2020		2019		2020		2019
	(in thousands)				(in thousands)
Stock options	$	173	$	756	$	395	$	967
Restricted stock units		227		122		475		247
Total	$	400	$	878	$	870	$	1,214