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CONSOLIDATED BALANCE SHEETS (Parenthenticals) (USD $)
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Dec. 31, 2011
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Dec. 31, 2010
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|---|---|---|
| Statement Of Financial Position [Abstract] | ||
| Allowance for doubtful accounts receivable | $ 727,754 | $ 470,998 |
| Accumulated depreciation on Leasehold improvements and equipment | $ 13,610,392 | $ 12,428,434 |