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Note 10 - Income Taxes (Detail) - The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities: (USD $) | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Deferred tax assets: |  |
Deferred revenue | $ 5,429,220 | $ 5,648,563
Amortization | 541,242 | 1,231,814
Total gross deferred tax assets | 5,970,462 | 6,880,377
Net deferred tax assets | 5,970,462 | 6,880,377
Deferred income tax asset, long-term portion | 5,970,462 | 6,880,377
| 5,970,462 | 6,880,377
Deferred tax liabilities: |  |
Reserves and other | (914,429) | (880,008)
Limited life intangible assets | (394,100) | (505,700)
Indefinite life intangible assets | (4,840,000) | (4,840,000)
Total deferred tax liabilities | (6,148,529) | (6,225,708)
Less deferred tax liability, current portion | (914,429) | (880,008)
Deferred tax liability, long-term portion | $ (5,234,100) | $ (5,345,700)

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