Annual report pursuant to Section 13 and 15(d)

Earnings (Loss) Per Share (EPS) - Summary of Reconciliation of Income and Number of Shares Used to Calculate Basic and Diluted Earnings per Share (EPS) (Details)

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Earnings (Loss) Per Share (EPS) - Summary of Reconciliation of Income and Number of Shares Used to Calculate Basic and Diluted Earnings per Share (EPS) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Share [Abstract]                    
Net income (loss) available to common stockholders $ (2,121) $ 3,989 $ 4,641 $ (90,248) $ (43,073) $ (71,857) $ (23,784) $ (29,702) $ 6,509 $ (168,416)
Basic earnings (loss) per share (in shares) [1]       9,368,322         15,044,919 9,311,722
Basic earnings (loss) per common share (in dollars per share) $ (0.14) $ 0.27 $ 0.31 $ (9.63) $ (4.60) $ (7.70) $ (2.56) $ (3.21) $ 0.43 $ (18.09)
Unvested restricted stock units (in shares)       0         15,446 0
Unvested stock options       0         0 0
Warrants       0         0 0
Preferred stock       0         0 0
Number of shares used for diluted EPS computation (in shares) [1]       9,368,322         15,060,365 9,311,722
Diluted earnings (loss) per common share (in dollars per share) $ (0.14) $ 0.27 $ 0.31 $ (9.63) $ (4.60) $ (7.70) $ (2.56) $ (3.21) $ 0.43 $ (18.09)
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