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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
CONSOLIDATED STATEMENTS OF OPERATIONS        
Net sales $ 75,843 $ 68,778 $ 221,477 $ 168,715
Cost of goods sold 59,799 52,542 172,363 132,541
Gross profit 16,044 16,236 49,114 36,174
Selling, general and administrative expenses 7,701 7,886 23,383 20,896
Operating income 8,343 8,350 25,731 15,278
Interest income 4 10 22 86
Income before income taxes 8,347 8,360 25,753 15,364
Income tax provision 1,660 1,825 5,175 2,914
Net income $ 6,687 $ 6,535 $ 20,578 $ 12,450
Earnings per share        
Basic $ 0.20 $ 0.19 $ 0.61 $ 0.37
Diluted 0.20 0.19 0.61 0.37
Dividends paid per share $ 0.12 $ 0.08 $ 0.34 $ 0.28