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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 52,273,392 $ 70,599,146
Marketable securities 18,245,440  
Accounts receivable, net of allowances 4,991,612 7,082,890
Inventories 7,316,606 5,774,694
Other current assets 3,430,107 3,851,337
Total current assets 86,257,157 87,308,067
Property and equipment, net 1,100,253 1,119,339
Intangible assets, net 7,373,013 7,023,064
Other assets 650,173 67,846
Total assets 95,380,596 95,518,316
Current liabilities:    
Accounts payable 2,936,081 1,513,548
Other current liabilities 4,195,985 5,086,400
Total current liabilities 7,132,066 6,599,948
Revolving line of credit 4,359,951 4,859,951
Other long-term liabilities 674,973 1,223,148
Total liabilities 12,166,990 12,683,047
Commitments and contingencies      
Shareholders' equity:    
Common stock - no par value; 100,000,000 shares authorized; 19,699,237 and 20,020,535 shares issued and outstanding as of June 30, 2012 and December 31, 2011, respectively 68,500,397 70,272,155
Retained earnings 14,824,160 12,656,662
Total shareholders' equity 83,324,557 82,928,817
Noncontrolling interests (110,951) (93,548)
Total equity 83,213,606 82,835,269
Total liabilities and equity $ 95,380,596 $ 95,518,316