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Consolidated Statements of Income and Comprehensive Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Income Statement [Abstract]    
Net sales $ 123,879 $ 118,587
Cost of goods sold 86,524 86,292
Depreciation expense 2,323 2,413
Total cost of goods sold 88,847 88,705
Gross profit 35,032 29,882
Selling expenses 14,467 11,892
General and administrative 13,783 12,871
Amortization expense 697 716
Total operating expenses 28,947 25,479
Income from operations 6,085 4,403
Other income (expense):    
Interest expense (220) (236)
Loss on sale of investments, net reclassified from OCI (15) (72)
Gain (Loss) on sale of property and equipment (284) 253
Impairment of investments 0 (475)
Other income 71 119
Total other income (expense) (448) (411)
Income before provision for income taxes 5,637 3,992
Provision for income taxes 2,158 2,020
Net income $ 3,479 $ 1,972
Basic earnings per common share $ .22 $ 0.12
Diluted earnings per common share $ .22 $ .12
Weighted average number of shares outstanding - Basic 16,155,000 16,331,000
Weighted average number of shares outstanding - Diluted 16,160,000 16,331,000
COMPREHENSIVE INCOME    
Net income $ 3,479 $ 1,972
Other comprehensive income (loss), net of tax:    
Unrealized gains (losses) on investments, net of $38 and $30 of taxes 62 (47)
Reclassifications to earnings:    
Other than temporary impairment of investments, net of $84 of taxes 0 130
Realized (gains) losses on investments, net of $6 and ($28) of taxes 9 44
Comprehensive income $ 3,550 $ 2,099