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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

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