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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net loss	$ (12,196)	$ (6,655)	$ (28,503)	$ (20,309)
Denominator:
Weighted average common shares outstanding (in shares)	2,221	2,000	2,174	2,000
Effect of dilutive securities:
Outstanding common stock equivalents (in shares)	0	0	0	0
Denominator for diluted loss per common share (in shares)	2,221	2,000	2,174	2,000
Basic and diluted earnings (loss) per common share:
Basic loss per common share (in dollars per share)	$ (5.49)	$ (3.33)	$ (13.11)	$ (10.15)
Diluted loss per common share (in dollars per shares)	$ (5.49)	$ (3.33)	$ (13.11)	$ (10.15)
Excluded outstanding share-based awards having an anti-dilutive effect (in shares)	1,429	1,803	1,488	1,803