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Selected Quarterly Financial Data - Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 132,326 | $ 236,699 | $ 105,781 | $ 93,004 | $ 136,628 | $ 262,413 | $ 119,565 | $ 94,505 | $ 567,810 | $ 613,111 | $ 706,603
Gross profit | 40,486 | 64,330 | 27,941 | 22,959 | 30,160 | 61,781 | 33,719 | 30,021 | 155,716 | 155,681 | 223,021
Income (Loss) from Operations | (4,418) | 20,043 | (12,140) | (35,658) | (26,580) | (7,746) | (14,108) | (15,724) | (32,173) | (64,158) | 17,106
Income (loss) before provision (benefit) for income taxes | (2,100) | 17,652 | (16,497) | (38,529) | (29,771) | (16,651) | (16,371) | (18,629) | (39,474) | (81,422) | 5,376
Net income (loss) | $ (3,343) | $ 15,699 | $ (18,588) | $ (36,193) | $ (30,487) | $ (17,569) | $ (16,687) | $ (18,285) | $ (42,368) | $ (83,085) | $ 1,243
Basic earnings (loss) per share (in dollars per share) | $ (0.14) | $ 0.68 | $ (0.80) | $ (1.57) | $ (1.33) | $ (0.77) | $ (0.77) | $ (1.01) | $ (1.83) | $ (3.89) | $ 0.08
Weighted average shares outstanding (in shares) | 23,106 | 23,106 | 23,106 | 23,100 | 22,799 | 22,772 | 21,616 | 18,104 | 23,104 | 21,341 | 16,542
Diluted earnings (loss) per share (in dollars per share) | $ (0.14) | $ 0.38 | $ (0.80) | $ (1.57) | $ (1.33) | $ (0.77) | $ (0.77) | $ (1.01) | $ (1.83) | $ (3.89) | $ 0.07
Diluted weighted number of shares (in shares) | 23,106 | 45,686 | 23,106 | 23,100 | 22,799 | 22,772 | 21,616 | 18,104 | 23,104 | 21,341 | 16,665

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