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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
Mar. 31, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 55,643,561 $ 70,599,146
Marketable securities 16,001,622 0
Accounts receivable, net of allowances 4,463,367 7,082,890
Inventories 6,005,478 5,774,694
Other current assets 4,169,221 3,851,337
Total current assets 86,283,249 87,308,067
Property and equipment, net 1,054,771 1,119,339
Intangible assets, net 7,166,652 7,023,064
Other assets 63,472 67,846
Total assets 94,568,144 95,518,316
Current liabilities:    
Accounts payable 2,304,317 1,513,548
Other current liabilities 3,855,648 5,086,400
Total current liabilities 6,159,965 6,599,948
Revolving line of credit 5,109,951 4,859,951
Other long-term obligations 1,450,004 1,223,148
Total liabilities 12,719,920 12,683,047
Commitments and contingencies      
Shareholders' equity:    
Common stock--no par value; 100,000,000 shares authorized; 19,870,637 and 20,020,535 shares issued and outstanding as of March 31, 2012 and December 31, 2011, respectively 68,871,269 70,272,155
Retained earnings 13,079,870 12,656,662
Total shareholders' equity 81,951,139 82,928,817
Noncontrolling interests (102,915) (93,548)
Total equity 81,848,224 82,835,269
Total liabilities and equity $ 94,568,144 $ 95,518,316