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Quarterly Financial Information (Unaudited) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information (unaudited) |
Quarterly Financial Information (Unaudited) | 21. Quarterly Financial Information (Unaudited) ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | 2020
​ | ​ | ​ | First | ​ | ​ | Second | ​ | ​ | Third | ​ | ​ | Fourth
​ | ​ | ​ | ​
Net sales | ​ | $ | 68,190 | ​ | $ | 120,043 | ​ | $ | 133,761 | ​ | $ | 158,160
Gross profit | ​ | $ | 11,690 | ​ | $ | 32,075 | ​ | $ | 36,728 | ​ | $ | 47,787
Income (loss) before taxes | ​ | $ | (13,348) | ​ | $ | (121,315) | ​ | $ | 12,464 | ​ | $ | 23,370
Net income (loss) | ​ | $ | (10,086) | ​ | $ | (103,859) | ​ | $ | 9,230 | ​ | $ | 18,162
Basic net earnings (loss) per common share attributable to common shareholders | ​ | $ | (0.44) | ​ | $ | (4.55) | ​ | $ | 0.40 | ​ | $ | 0.78
Earnings (loss) per common share assuming dilution attributable to common shareholders | ​ | $ | (0.44) | ​ | $ | (4.55) | ​ | $ | 0.39 | ​ | $ | 0.78
Dividends per share | ​ | $ | 0.28 | ​ | $ | 0.28 | ​ | $ | 0.28 | ​ | $ | 0.28
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | 2019 | ​
​ | ​ | ​ | First | ​ | ​ | Second | ​ | ​ | Third | ​ | ​ | Fourth | ​
​ | ​ | ​ | ​ | ​
Net sales | ​ | $ | 93,187 | ​ | $ | 176,356 | ​ | $ | 141,869 | ​ | $ | 160,298 | ​
Gross profit | ​ | $ | 22,946 | ​ | $ | 59,593 | ​ | $ | 39,939 | ​ | $ | 46,339 | ​
Income (loss) before taxes | ​ | $ | (760) | ​ | $ | 33,773 | ​ | $ | 15,542 | ​ | $ | 14,062 | ​
Net income (loss) | ​ | $ | (297) | ​ | $ | 25,474 | ​ | $ | 12,429 | ​ | $ | 11,560 | ​
Basic net earnings (loss) per common share attributable to common shareholders | ​ | $ | (0.01) | ​ | $ | 1.10 | ​ | $ | 0.54 | ​ | $ | 0.50 | ​
Earnings (loss) per common share assuming dilution attributable to common shareholders | ​ | $ | (0.01) | ​ | $ | 1.10 | ​ | $ | 0.53 | ​ | $ | 0.50 | ​
Dividends per share | ​ | $ | 0.27 | ​ | $ | 0.27 | ​ | $ | 0.27 | ​ | $ | 0.27 | ​
​ Due to changes in stock prices during the year and timing of issuance of shares, the sum of quarterly earnings per share may not equal the annual earnings per share.

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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