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Note 9 - Income Taxes (Details) - Tax Effects of Temporary Differences That Give Rise to Significant Portions of the Deferred Tax Assets and Liabilities (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Deferred tax assets: |  |
Deferred revenue | $ 5,294,767 us-gaap_DeferredTaxAssetsDeferredIncome | $ 5,300,868 us-gaap_DeferredTaxAssetsDeferredIncome
Losses |  | 290,714 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Foreign tax credit | 3,200,961 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign | 1,914,090 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign
Amortization | (414,345)us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment | 69,169 us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment
Accruals, including foreign exchange and other | (702,764)us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals | (1,123,278)us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals
Deferred tax assets | 7,378,619 us-gaap_DeferredTaxAssetsGross | 6,451,563 us-gaap_DeferredTaxAssetsGross
Deferred income tax asset, current portion | 2,498,196 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent | 1,081,526 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent
Deferred income tax asset, long-term portion | 4,880,423 us-gaap_DeferredTaxAssetsGrossNoncurrent | 5,370,037 us-gaap_DeferredTaxAssetsGrossNoncurrent
| 7,378,619 us-gaap_DeferredTaxAssetsGross | 6,451,563 us-gaap_DeferredTaxAssetsGross
Deferred tax liabilities: |  |
Limited life intangible assets | (208,620)us-gaap_DeferredTaxLiabilitiesOtherFiniteLivedAssets | (301,500)us-gaap_DeferredTaxLiabilitiesOtherFiniteLivedAssets
Indefinite life intangible assets | (4,578,731)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets | (4,840,000)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
Total deferred tax liability, long-term portion | $ (4,787,351)us-gaap_DeferredTaxLiabilitiesNoncurrent | $ (5,141,500)us-gaap_DeferredTaxLiabilitiesNoncurrent

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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