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Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Income Statement [Abstract]        
Net sales $ 25,014 $ 23,153 $ 50,402 $ 47,768
Cost of goods sold 17,279 16,843 35,903 34,410
Depreciation expense 807 747 1,574 1,492
Total cost of goods sold 18,086 17,590 37,477 35,902
Gross profit 6,928 5,563 12,925 11,866
Selling expenses 2,720 2,691 5,295 5,830
General and administrative 2,731 2,898 5,876 6,390
Amortization expense 39 40 78 113
Total operating expenses 5,490 5,629 11,249 12,333
Income (loss) from operations 1,438 (66) 1,676 (467)
Other income (expense):        
Interest expense (30) (68) (69) (137)
Gain on investments 4 0 4 0
(Loss) gain on sale of property and equipment (33) 4 (28) 29
Other income, net 5 2 2 5
Total other income (expense) (54) (62) (91) (103)
Income (loss) before provision for income taxes 1,384 (128) 1,585 (570)
Provision (benefit) for income taxes 404 13 459 (41)
Net income (loss) $ 980 $ (141) $ 1,126 $ (529)
Earnings (loss) per common share - Basic $ 0.06 $ (0.01) $ 0.07 $ (0.03)
Earnings (loss) per common share - Dilited $ 0.06 $ (0.01) $ 0.07 $ (0.03)
Weighted average number of shares outstanding - Basic 15,560 15,775 15,591 15,771
Weighted average number of shares outstanding - Diluted 15,586 15,775 15,607 15,771