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Consolidated Statements Of Income And Comprehensive Income (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Consolidated Statements Of Income And Comprehensive Income [Abstract]    
Sales $ 27,590,622 $ 21,545,896
Less: discounts and allowances (3,203,591) (2,148,699)
Net sales 24,387,031 19,397,197
Cost of goods sold 15,402,875 12,906,722
Depreciation expense 394,125 399,045
Total cost of goods sold 15,797,000 13,305,767
Gross profit 8,590,030 6,091,430
Selling expenses 2,813,572 2,721,973
General and administrative 1,868,100 1,308,222
Amortization expense 177,842 188,705
Total operating expenses 4,859,514 4,218,900
Income from operations 3,730,517 1,872,530
Other income (expense):    
Interest and dividend income 15,009 11,573
Rental income 3,269 3,000
Interest expense (36,299) (50,186)
Gain (loss) on sale of investments, net 64,335 17,985
Other Expense      
Total other income (expense) 46,314 17,628
Income before provision for income taxes 3,776,831 1,854,902
Provision for income taxes 1,411,192 759,913
Net income 2,365,639 1,094,989
Basic and diluted earnings per common share $ 0.14 $ 0.07
Weighted average number of shares outstanding 16,346,017 16,397,998
COMPREHENSIVE INCOME    
Net income 2,365,639 1,094,989
Other comprehensive income (loss), net of tax:    
Unrealized gains on investments (net of tax) 51,535 29,000
Less reclassification adjustment for (gains) losses included in net income (net of taxes) (36,349) 10,162
Comprehensive income $ 2,380,824 $ 1,134,151