Income (Loss) Per Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income (Loss) Per Common Share
Net income (loss), Basic	$ (8,302)	$ (15,565)	$ (8,869)	$ (34,095)
Net income (loss), Diluted	$ (8,302)	$ (15,565)	$ (8,869)	$ (34,095)
Net income (loss) per common share:
Basic (in dollars per share)	$ (0.17)	$ (0.33)	$ (0.18)	$ (0.72)
Diluted (in dollars per share)	$ (0.17)	$ (0.33)	$ (0.18)	$ (0.72)
Weighted average shares reconciliation
Basic weighted average shares outstanding	48,109	47,112	48,147	47,145
Diluted weighted average shares outstanding	48,109	47,112	48,147	47,145