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Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Income Statement [Abstract]        
Net sales $ 26,039 $ 22,729 $ 76,441 $ 70,497
Cost of goods sold 17,710 16,813 53,613 51,223
Depreciation expense 752 743 2,326 2,235
Total cost of goods sold 18,462 17,556 55,939 53,458
Gross profit 7,577 5,173 20,502 17,039
Selling expenses 2,116 2,679 7,411 8,509
General and administrative 2,805 2,710 8,681 9,100
Amortization expense 39 39 117 152
Total operating expenses 4,960 5,428 16,209 17,761
Income (loss) from operations 2,617 (255) 4,293 (722)
Other income (expense):        
Interest expense (27) (65) (96) (202)
Gain on investments 0 0 4 0
(Loss) gain on sale of property and equipment 0 154 (28) 183
Other income, net 0 77 2 82
Total other income (expense) (27) 166 (118) 63
Income (loss) before provision for income taxes 2,590 (89) 4,175 (659)
Provision (benefit) for income taxes 764 (17) 1,223 (58)
Net income (loss) $ 1,826 $ (72) $ 2,952 $ (601)
Earnings (loss) per common share - Basic $ 0.12 $ (0.00) $ 0.19 $ (0.04)
Earnings (loss) per common share - Dilited $ 0.12 $ (0.00) $ 0.19 $ (0.04)
Weighted average number of shares outstanding - Basic 15,602 15,740 15,595 15,761
Weighted average number of shares outstanding - Diluted 15,642 15,740 15,621 15,761