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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
Sep. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 50,801,571 $ 70,599,146
Marketable securities 18,559,476  
Accounts receivable, net of allowances 5,467,455 7,082,890
Inventories 7,511,641 5,774,694
Other current assets 4,451,786 3,851,337
Total current assets 86,791,929 87,308,067
Property and equipment, net 1,120,591 1,119,339
Intangible assets, net 8,367,508 7,023,064
Other assets 653,768 67,846
Total assets 96,933,796 95,518,316
Current liabilities:    
Accounts payable 4,228,230 1,513,548
Other current liabilities 4,429,904 5,086,400
Total current liabilities 8,658,134 6,599,948
Revolving line of credit 4,359,951 4,859,951
Other long-term liabilities 583,790 1,223,148
Total liabilities 13,601,875 12,683,047
Commitments and contingencies      
Shareholders' equity:    
Common stock - no par value; 100,000,000 shares authorized;19,173,846 and 20,020,535 shares issued and outstanding as of September 30, 2012 and December 31, 2011, respectively 66,756,556 70,272,155
Retained earnings 16,693,654 12,656,662
Total shareholders' equity 83,450,210 82,928,817
Noncontrolling interests (118,289) (93,548)
Total equity 83,331,921 82,835,269
Total liabilities and equity $ 96,933,796 $ 95,518,316