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Consolidated Statements of Operations - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Consolidated Statements Of Operations    
Net sales $ 137,321,395 $ 130,550,349
Cost of goods sold 86,672,413 82,651,076
Gross profit 50,648,982 47,899,273
Selling, general and administrative expenses 43,192,076 40,016,220
Operating income 7,456,906 7,883,053
Interest:    
Interest expense (1,891,042) (1,356,536)
Interest income 32,818 29,376
Interest expense, net (1,858,224) (1,327,160)
Other expense (67,458) (62,596)
Total other expense, net (1,925,682) (1,389,756)
Income before income tax expense 5,531,224 6,493,297
Income tax expense 932,874 2,440,818
Net income $ 4,598,350 $ 4,052,479
Basic earnings per share $ 1.36 $ 1.21
Diluted earnings per share $ 1.3 $ 1.09