Note 9 - Income Taxes (Details Textual) - USD ($)  | 
12 Months Ended | |
|---|---|---|
Dec. 31, 2015  | 
Dec. 31, 2014  | 
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| Earliest Tax Year [Member] | Domestic Tax Authority [Member] | ||
| Open Tax Year | 2011 | |
| Earliest Tax Year [Member] | State and Local Jurisdiction [Member] | ||
| Open Tax Year | 2011 | |
| Latest Tax Year [Member] | Domestic Tax Authority [Member] | ||
| Open Tax Year | 2012 | |
| Latest Tax Year [Member] | State and Local Jurisdiction [Member] | ||
| Open Tax Year | 2012 | |
| Domestic Tax Authority [Member] | ||
| Operating Loss Carryforwards | $ 4,533,000 | |
| State and Local Jurisdiction [Member] | ||
| Operating Loss Carryforwards | 6,016,000 | |
| Other Liabilities [Member] | ||
| Liability for Uncertain Tax Positions, Noncurrent | 65,600 | $ 121,700 | 
| General and Administrative Expense [Member] | ||
| Income Tax Examination, Penalties and Interest Expense | $ 33,000 | $ 30,000 | 
| Effective Income Tax Rate Reconciliation, Percent | 2.60% | 79.30% | 
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The noncurrent portion of the amount recognized for uncertain tax positions as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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