Loss Per 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	$ (8,979)	$ (10,581)	$ (170,094)	$ (20,350)
Less: preferred dividends		(1,892)		(5,548)
Net loss attributable to common stockholders	$ (8,979)	$ (12,473)	$ (170,094)	$ (25,898)
Denominator:
Weighted average common shares outstanding (in shares)	58,736	14,085	58,638	13,873
Loss per common share - basic (in dollars per share)	$ (0.15)	$ (0.89)	$ (2.90)	$ (1.87)
Numerator:
Net loss	$ (8,979)	$ (10,581)	$ (170,094)	$ (20,350)
Less: preferred dividends		(1,892)		(5,548)
Net loss attributable to common stockholders	$ (8,979)	$ (12,473)	$ (170,094)	$ (25,898)
Denominator:
Weighted average common shares outstanding (in shares)	58,736	14,085	58,638	13,873
Dilutive common shares	58,736	14,085	58,638	13,873
Loss per common share - diluted (in dollars per share)	$ (0.15)	$ (0.89)	$ (2.90)	$ (1.87)
Modified Convertible Notes
Denominator:
Anti-dilutive securities excluded from computation of earnings per share (in shares)	1,299	1,278	1,299	1,278
2024 Convertible Notes
Denominator:
Anti-dilutive securities excluded from computation of earnings per share (in shares)	3,125		3,125
Preferred Series A
Denominator:
Anti-dilutive securities excluded from computation of earnings per share (in shares)		4,480		4,480
Series A-1
Denominator:
Anti-dilutive securities excluded from computation of earnings per share (in shares)		4,588		4,588
Warrants
Denominator:
Anti-dilutive securities excluded from computation of earnings per share (in shares)	500	650	500	650
Stock options
Denominator:
Anti-dilutive securities excluded from computation of earnings per share (in shares)	321	71	321	71
RSUs
Denominator:
Anti-dilutive securities excluded from computation of earnings per share (in shares)	9,900	757	9,900	757
PSUs
Denominator:
Anti-dilutive securities excluded from computation of earnings per share (in shares)	2,944	453	2,944	453