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CONDENSED CONSOLIDATED BALANCE SHEETS PARENTHETICALS (USD $)
Mar. 31, 2012
Dec. 31, 2011
Trade accounts receivable, allowance for doubtful accounts $ 3,876,469 $ 3,536,405
Other receivables, allowance for doubtful accounts 41,106 38,921
Property and equipment, accumulated depreciation 3,624,697 3,391,124
Intangible assets, accumulated amortization $ 3,213,631 $ 3,041,804
Preferred stock, par value $ 0.001 $ 0.001
Preferred Stock, shares authorized 5,000,000 5,000,000
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 95,000,000 95,000,000
Common stock, shares issued 43,529,557 43,529,557
Common stock, shares outstanding 43,529,557 43,529,557