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Note 18 - Restatement (Details) - Net Deferred Tax Assets (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Deferred tax assets: |  |
Federal, state and foreign loss carryforwards | $ 3,862,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | $ 6,527,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Capital loss carryforward | 3,570,000 us-gaap_DeferredTaxAssetsCapitalLossCarryforwards |
Capitalized research and development |  | 475,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther
Deferred revenue | 71,000 us-gaap_DeferredTaxAssetsDeferredIncome | 77,000 us-gaap_DeferredTaxAssetsDeferredIncome
Federal and state tax credits | 520,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards | 1,762,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards
Other | 503,000 us-gaap_DeferredTaxAssetsOther | 563,000 us-gaap_DeferredTaxAssetsOther
Total deferred tax asset | 8,526,000 us-gaap_DeferredTaxAssetsGross | 9,404,000 us-gaap_DeferredTaxAssetsGross
Less valuation allowance | (8,526,000)us-gaap_DeferredTaxAssetsValuationAllowance | (9,404,000)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred tax asset | 0 us-gaap_DeferredTaxAssetsLiabilitiesNet |
Scenario, Previously Reported [Member] |  |
Deferred tax assets: |  |
Federal, state and foreign loss carryforwards | 7,039,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Capitalized research and development | 241,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Deferred revenue | 71,000 us-gaap_DeferredTaxAssetsDeferredIncome / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Federal and state tax credits | 2,269,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Other | 503,000 us-gaap_DeferredTaxAssetsOther / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Total deferred tax asset | 10,123,000 us-gaap_DeferredTaxAssetsGross / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Less valuation allowance | (10,123,000)us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Net deferred tax asset | $ 0 us-gaap_DeferredTaxAssetsLiabilitiesNet / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital 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 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 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 after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + 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 temporary differences not separately disclosed. + 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 The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance. + 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from other provisions, reserves, allowances, and accruals not separately disclosed. + 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 -Glossary Deferred Tax Asset -URI http://asc.fasb.org/extlink&oid=6510090 Reference 4: 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 of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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