Quarterly Selected Financial Data (as Restated) (Unaudited) - Reconciliation of Unaudited Interim Condensed Consolidated Statements of Operations and Condensed Consolidated Statements of Comprehensive Income (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
Mar. 31, 2019	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Jun. 30, 2019	Mar. 19, 2019	Mar. 19, 2019	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2018
Interest expense and warrant issuance costs		$ (3,476)	$ (3,483)	$ (5,387)	$ (3,743)			$ (4,828)			$ (6,316)	$ (9,130)	$ (11,227)	$ (12,613)	$ (13,522)		$ (16,089)	$ (34,099)
Change in fair value of warrant liabilities	$ (7,700)	(43,400)	(25,100)	12,100	50,300	$ (9,000)	$ 600	(11,300)	$ (3,600)			62,400	(10,700)	37,300	(19,700)	$ (19,700)	(6,100)
Total other expense, net	(8,257)	(46,865)	(28,564)	6,713	46,557	(13,080)	(3,971)	(16,128)	(7,871)		(9,729)	53,270	(20,099)	24,706	(33,179)		(22,159)	(33,690)
(Loss) income before income tax expense (benefit)	(29,533)	(71,931)	(47,935)	(20,708)	(146,589)	(7,116)	4,367	(29,306)	227		(24,672)	(167,297)	(24,939)	(215,232)	(32,055)		(287,163)	14,831
Net (loss) Income	(30,279)	(71,375)	(47,547)	(20,693)	(148,362)	(6,885)	4,270	(29,320)	959	$ (24,781)	(24,781)	(169,055)	(25,050)	(216,602)	(31,935)	$ (31,935)	(287,977)	13,743
Comprehensive (loss) income attributable to common shareholders and parent, respectively	(30,383)	(71,375)	(47,547)	(20,693)	(148,362)	(7,857)	2,962	(30,374)	9	$ (25,459)	(25,459)	(169,055)	(27,412)	(216,602)	(35,269)		(287,977)	9,886
Comprehensive (loss) income	$ (31,208)	$ (71,063)	$ (47,065)	$ (21,195)	$ (154,848)	$ (6,243)	$ 3,022	$ (31,329)	$ (121)		$ (25,624)	$ (176,043)	$ (27,743)	$ (223,108)	$ (34,550)		$ (294,171)	$ 9,593
NET LOSS PER VOTING AND NON-VOTING SHARE
Basic	$ (0.50)	$ (0.84)	$ (0.56)	$ (0.31)	$ (2.43)	$ (0.13)	$ 0.05	$ (0.50)	$ 0.00			$ (2.66)	$ (0.45)	$ (3.06)	$ (0.58)		$ (3.87)
Diluted	$ (0.50)	$ (0.84)	$ (0.56)	$ (0.31)	$ (3.23)	$ (0.13)	$ 0.04	$ (0.50)	$ 0.00			$ (2.66)	$ (0.45)	$ (3.06)	$ (0.58)		$ (3.87)
As Reported [Member]
Interest expense and warrant issuance costs		$ (3,476)	$ (3,483)	$ (4,001)	$ (3,743)			$ (4,828)				$ (7,744)	$ (11,227)	$ (11,227)			$ (14,703)
Total other expense, net	$ (557)	(3,465)	(3,464)	(4,001)	(3,743)	$ (4,080)	$ (4,571)	(4,828)	$ (4,271)			(7,744)	(9,399)	(11,208)	$ (13,479)		(14,673)
(Loss) income before income tax expense (benefit)	(21,833)	(28,531)	(22,835)	(31,422)	(196,889)	1,884	3,767	(18,006)	3,827			(228,311)	(14,239)	(251,146)	(12,355)		(279,677)
Net (loss) Income	(22,579)	(27,975)	(22,447)	(31,407)	(198,662)	2,115	3,670	(18,020)	4,559			(230,069)	(14,350)	(252,516)	(12,235)		(280,491)
Comprehensive (loss) income attributable to common shareholders and parent, respectively	(22,683)					1,143	2,362	(19,074)	3,609			(230,069)	(16,712)	(252,516)	(15,569)
Comprehensive (loss) income	$ (23,508)	$ (27,663)	$ (21,965)	$ (31,909)	$ (205,148)	$ 2,757	$ 2,422	$ (20,029)	$ 3,479			$ (237,057)	$ (17,043)	$ (259,022)	(14,850)		(286,685)
NET LOSS PER VOTING AND NON-VOTING SHARE
Basic	$ (0.37)	$ (0.33)	$ (0.26)	$ (0.48)	$ (3.25)	$ 0.02	$ 0.04	$ (0.31)	$ 0.06			$ (3.62)	$ (0.27)	$ (3.57)
Diluted	$ (0.37)	$ (0.33)	$ (0.26)	$ (0.48)	$ (3.25)	$ 0.02	$ 0.03	$ (0.31)	$ 0.05			$ (3.62)	$ (0.27)	$ (3.57)
Restatement Impact [Member]
Interest expense and warrant issuance costs				$ (1,386)								$ (1,386)		$ (1,386)			(1,386)
Change in fair value of warrant liabilities	$ (7,700)	$ (43,400)	$ (25,100)	12,100	$ 50,300	$ (9,000)	$ 600	$ (11,300)	$ (3,600)			62,400	$ (10,700)	37,300	(19,700)		(6,100)
Total other expense, net	(7,700)	(43,400)	(25,100)	10,714	50,300	(9,000)	600	(11,300)	(3,600)			61,014	(10,700)	35,914	(19,700)		(7,486)
(Loss) income before income tax expense (benefit)	(7,700)	(43,400)	(25,100)	10,714	50,300	(9,000)	600	(11,300)	(3,600)			61,014	(10,700)	35,914	(19,700)		(7,486)
Net (loss) Income	(7,700)	(43,400)	(25,100)	10,714	50,300	(9,000)	600	(11,300)	(3,600)			61,014	(10,700)	35,914	(19,700)		(7,486)
Comprehensive (loss) income attributable to common shareholders and parent, respectively	(7,700)					(9,000)	600	(11,300)	(3,600)			61,014	(10,700)	35,914	(19,700)
Comprehensive (loss) income	$ (7,700)	$ (43,400)	$ (25,100)	$ 10,714	$ 50,300	$ (9,000)	$ 600	$ (11,300)	$ (3,600)			$ 61,014	$ (10,700)	$ 35,914	$ (19,700)		$ (7,486)
NET LOSS PER VOTING AND NON-VOTING SHARE
Basic	$ (0.13)	$ (0.51)	$ (0.30)	$ 0.16	$ 0.82	$ (0.15)	$ 0.01	$ (0.18)	$ (0.06)			$ 0.96	$ (0.18)	$ 0.51
Diluted	$ (0.13)	$ (0.51)	$ (0.30)	$ 0.16	$ 0.02	$ (0.15)	$ 0.01	$ (0.18)	$ (0.05)			$ 0.96	$ (0.18)	$ 0.51

Quarterly Selected Financial Data (as Restated) (Unaudited) - Reconciliation of Unaudited Interim Condensed Consolidated Statements of Operations and Condensed Consolidated Statements of Comprehensive Income (Details) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

6 Months Ended

9 Months Ended

12 Months Ended

Mar. 31, 2019

Dec. 31, 2020

Sep. 30, 2020

Jun. 30, 2020

Mar. 31, 2020

Dec. 31, 2019

Sep. 30, 2019

Jun. 30, 2019

Mar. 19, 2019

Jun. 30, 2020

Sep. 30, 2019

Sep. 30, 2020

Dec. 31, 2019

Dec. 31, 2020

Dec. 31, 2018

Interest expense and warrant issuance costs

$ (3,476)

$ (3,483)

$ (5,387)

$ (3,743)

$ (4,828)

$ (6,316)

$ (9,130)

$ (11,227)

$ (12,613)

$ (13,522)

$ (16,089)

$ (34,099)

Change in fair value of warrant liabilities

$ (7,700)

(43,400)

(25,100)

12,100

50,300

$ (9,000)

$ 600

(11,300)

$ (3,600)

62,400

(10,700)

37,300

(19,700)

$ (19,700)

(6,100)

Total other expense, net

(8,257)

(46,865)

(28,564)

6,713

46,557

(13,080)

(3,971)

(16,128)

(7,871)

(9,729)

53,270

(20,099)

24,706

(33,179)

(22,159)

(33,690)

(Loss) income before income tax expense (benefit)

(29,533)

(71,931)

(47,935)

(20,708)

(146,589)

(7,116)

4,367

(29,306)

227

(24,672)

(167,297)

(24,939)

(215,232)

(32,055)

(287,163)

14,831

Net (loss) Income

(30,279)

(71,375)

(47,547)

(20,693)

(148,362)

(6,885)

4,270

(29,320)

959

$ (24,781)

(24,781)

(169,055)

(25,050)

(216,602)

(31,935)

$ (31,935)

(287,977)

13,743

Comprehensive (loss) income attributable to common shareholders and parent, respectively

(30,383)

(71,375)

(47,547)

(20,693)

(148,362)

(7,857)

2,962

(30,374)

$ (25,459)

(25,459)

(169,055)

(27,412)

(216,602)

(35,269)

(287,977)

9,886

Comprehensive (loss) income

$ (31,208)

$ (71,063)

$ (47,065)

$ (21,195)

$ (154,848)

$ (6,243)

$ 3,022

$ (31,329)

$ (121)

$ (25,624)

$ (176,043)

$ (27,743)

$ (223,108)

$ (34,550)

$ (294,171)

$ 9,593

NET LOSS PER VOTING AND NON-VOTING SHARE

Basic

$ (0.50)

$ (0.84)

$ (0.56)

$ (0.31)

$ (2.43)

$ (0.13)

$ 0.05

$ (0.50)

$ 0.00

$ (2.66)

$ (0.45)

$ (3.06)

$ (0.58)

$ (3.87)

Diluted

$ (0.50)

$ (0.84)

$ (0.56)

$ (0.31)

$ (3.23)

$ (0.13)

$ 0.04

$ (0.50)

$ 0.00

$ (2.66)

$ (0.45)

$ (3.06)

$ (0.58)

$ (3.87)

As Reported [Member]

Interest expense and warrant issuance costs

$ (3,476)

$ (3,483)

$ (4,001)

$ (3,743)

$ (4,828)

$ (7,744)

$ (11,227)

$ (14,703)

Total other expense, net

$ (557)

(3,465)

(3,464)

(4,001)

(3,743)

$ (4,080)

$ (4,571)

(4,828)

$ (4,271)

(7,744)

(9,399)

(11,208)

$ (13,479)

(14,673)

(Loss) income before income tax expense (benefit)

(21,833)

(28,531)

(22,835)

(31,422)

(196,889)

1,884

3,767

(18,006)

3,827

(228,311)

(14,239)

(251,146)

(12,355)

(279,677)

Net (loss) Income

(22,579)

(27,975)

(22,447)

(31,407)

(198,662)

2,115

3,670

(18,020)

4,559

(230,069)

(14,350)

(252,516)

(12,235)

(280,491)

Comprehensive (loss) income attributable to common shareholders and parent, respectively

(22,683)

1,143

2,362

(19,074)

3,609

(230,069)

(16,712)

(252,516)

(15,569)

Comprehensive (loss) income

$ (23,508)

$ (27,663)

$ (21,965)

$ (31,909)

$ (205,148)

$ 2,757

$ 2,422

$ (20,029)

$ 3,479

$ (237,057)

$ (17,043)

$ (259,022)

(14,850)

(286,685)

NET LOSS PER VOTING AND NON-VOTING SHARE

Basic

$ (0.37)

$ (0.33)

$ (0.26)

$ (0.48)

$ (3.25)

$ 0.02

$ 0.04

$ (0.31)

$ 0.06

$ (3.62)

$ (0.27)

$ (3.57)

Diluted

$ (0.37)

$ (0.33)

$ (0.26)

$ (0.48)

$ (3.25)

$ 0.02

$ 0.03

$ (0.31)

$ 0.05

$ (3.62)

$ (0.27)

$ (3.57)

Restatement Impact [Member]

Interest expense and warrant issuance costs

$ (1,386)

(1,386)

Change in fair value of warrant liabilities

$ (7,700)

$ (43,400)

$ (25,100)

12,100

$ 50,300

$ (9,000)

$ 600

$ (11,300)

$ (3,600)

62,400

$ (10,700)

37,300

(19,700)

(6,100)

Total other expense, net

(7,700)

(43,400)

(25,100)

10,714

50,300

(9,000)

600

(11,300)

(3,600)

61,014

(10,700)

35,914

(19,700)

(7,486)

(Loss) income before income tax expense (benefit)

(7,700)

(43,400)

(25,100)

10,714

50,300

(9,000)

600

(11,300)

(3,600)

61,014

(10,700)

35,914

(19,700)

(7,486)

Net (loss) Income

(7,700)

(43,400)

(25,100)

10,714

50,300

(9,000)

600

(11,300)

(3,600)

61,014

(10,700)

35,914

(19,700)

(7,486)

Comprehensive (loss) income attributable to common shareholders and parent, respectively

(7,700)

(9,000)

600

(11,300)

(3,600)

61,014

(10,700)

35,914

(19,700)

Comprehensive (loss) income

$ (7,700)

$ (43,400)

$ (25,100)

$ 10,714

$ 50,300

$ (9,000)

$ 600

$ (11,300)

$ (3,600)

$ 61,014

$ (10,700)

$ 35,914

$ (19,700)

$ (7,486)

NET LOSS PER VOTING AND NON-VOTING SHARE

Basic

$ (0.13)

$ (0.51)

$ (0.30)

$ 0.16

$ 0.82

$ (0.15)

$ 0.01

$ (0.18)

$ (0.06)

$ 0.96

$ (0.18)

$ 0.51

Diluted

$ (0.13)

$ (0.51)

$ (0.30)

$ 0.16

$ 0.02

$ (0.15)

$ 0.01

$ (0.18)

$ (0.05)

$ 0.96

$ (0.18)

$ 0.51