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Consolidated Balance Sheets (USD $)
Dec. 31, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 40,869,457 $ 54,349,381
Marketable securities 14,019,761 16,686,136
Accounts receivable, net of allowances 4,530,424 6,017,201
Inventories 5,722,882 6,218,355
Prepaid and other current assets 825,675 1,671,091
Deferred tax assets 2,711,516 2,290,078
Total current assets 68,679,715 87,232,242
Property and equipment, net 880,647 1,188,914
Intangible assets, net 15,498,819 9,476,798
Deferred tax assets 1,208,891 50,411
Other assets 1,345,666 645,366
Total assets 87,613,738 98,593,731
Current liabilities:    
Accounts payable 2,035,853 2,790,554
Other current liabilities 5,509,917 5,264,806
Total current liabilities 7,545,770 8,055,360
Revolving line of credit 0 4,359,951
Other long-term liabilities 776,125 611,933
Total liabilities 8,321,895 13,027,244
Commitments and contingencies      
Shareholders’ equity:    
Common stock – no par value; 100,000,000 shares authorized; 17,985,503 and 18,937,107 shares issued and outstanding as of December 31, 2013 and 2012, respectively 63,073,941 67,197,167
Retained earnings 16,394,540 18,499,154
Total shareholders’ equity 79,468,481 85,696,321
Noncontrolling interests (176,638) (129,834)
Total equity 79,291,843 85,566,487
Total liabilities and equity $ 87,613,738 $ 98,593,731