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Net Income (Loss) Per Common Share - Summary of Net Income (Loss) Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]        
Weighted Average Number of Shares Issued, Basic 43,067 42,753 42,952 42,671
Loss from continuing operations $ (5,391) $ (17,566) $ (10,304) $ (125,643)
Less: Preferred stock cumulative dividends and deemed dividends (2,211) (3,043) (16,740) (5,994)
Numerator for basic income (loss) from continuing operations per common share (7,602) (20,609) (27,044) (131,637)
Numerator for diluted income (loss) from continuing operations per common share (7,602) (20,609) (27,044) (131,637)
Loss from discontinued operations, net of tax (Note 2) 0 (4,182) 0 (144,296)
Numerator for basic undistributed net loss per common share (7,602) (24,791) (27,044) (275,933)
Numerator for diluted undistributed net loss per common share $ (7,602) $ (24,791) $ (27,044) $ (275,933)
Weighted Average Number of Shares, Restricted Stock (524) (556) (450) (517)
Weighted average common shares outstanding, diluted (in shares) 44,440 42,197 43,561 42,154
Basic loss from continuing operations per common share (in dollars per share) $ (0.17) $ (0.49) $ (0.62) $ (3.12)
Basic loss from discontinuing operations per common share (in dollars per share) 0 (0.10) 0 (3.43)
Basic net loss per share (in dollars per share) (0.17) (0.59) (0.62) (6.55)
Diluted loss from continuing operations per common share (in dollars per share) (0.17) (0.49) (0.62) (3.12)
Diluted loss from discontinuing operations per common share (in dollars per share) 0 (0.10) 0 (3.43)
Diluted net loss per share (in dollars per share) (0.17) (0.59) (0.62) (6.55)
Cash dividends declared per share (in dollars per share) $ 0 $ 0 $ 0 $ 0
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants 1,897 0 1,059 0
Weighted Average Number of Shares Outstanding, Basic and Diluted 44,440 42,197 43,561 42,154