Loss Per Share - Reconciliations of Basic and Diluted Earnings (Loss) Per Common Share (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
Numerator:
Net loss	$ (14,744)	$ (12,196)	$ (29,838)	$ (28,503)
Denominator:
Weighted average common shares outstanding (in shares)	72,924	2,221	50,599	2,174
Effect of dilutive securities:
Outstanding common stock equivalents (in shares)	0	0	0	0
Denominator for diluted loss per common share (in shares)	72,924	2,221	50,599	2,174
Basic and diluted earnings (loss) per common share:
Basic loss per common share (in dollars per share)	$ (0.20)	$ (5.49)	$ (0.59)	$ (13.11)
Diluted loss per common share (in dollars per shares)	$ (0.20)	$ (5.49)	$ (0.59)	$ (13.11)
Excluded outstanding share-based awards having an anti-dilutive effect (in shares)	986	1,429	1,083	1,488