Basis of Presentation and Significant Accounting Policies - Basic and Diluted Earnings Per Share Calculations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net loss	$ (40,660)	$ (38,515)
Denominator:
Weighted average common shares outstanding	5,596	219
Effect of dilutive securities:
Outstanding common stock equivalents (in shares)	0	0
Denominator for diluted (loss) earnings per share (in shares)	5,596	219
Net basic loss per common share (in dollars per share)	$ (7.27)	$ (175.87)
Net diluted loss per common share (in dollars per share)	$ (7.27)	$ (175.87)
Excluded outstanding share-based awards having an anti-dilutive effect (in shares)	84	143