Income (Loss) Per Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income (Loss) Per Common Share
Net income (loss), Basic	$ 580	$ (11,767)	$ (8,290)	$ (45,862)
Net income (loss), Diluted	$ 580	$ (11,767)	$ (8,290)	$ (45,862)
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.01	$ (0.25)	$ (0.17)	$ (0.97)
Diluted (in dollars per share)	$ 0.01	$ (0.25)	$ (0.17)	$ (0.97)
Weighted average shares reconciliation
Basic weighted average shares outstanding	48,341	47,489	48,327	47,361
Effect of potentially dilutive share-based awards	833
Diluted weighted average shares outstanding	49,174	47,489	48,327	47,361