Note 6 - Intangible Assets - Intangible Assets Acquired (Details) - USD ($) |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Gross Carrying Amount | $ 3,536,000 | $ 3,536,000 |
| Accumulated Amortization | 1,775,958 | 1,197,078 |
| Net Carrying Value | 1,760,042 | 2,338,922 |
| Franchise Rights [Member] | ||
| Gross Carrying Amount | 1,673,000 | 1,673,000 |
| Accumulated Amortization | 657,943 | 410,688 |
| Net Carrying Value | 1,015,057 | 1,262,312 |
| Customer Relationships [Member] | ||
| Gross Carrying Amount | 701,000 | 701,000 |
| Accumulated Amortization | 674,667 | 509,042 |
| Net Carrying Value | 26,333 | 191,958 |
| Development Rights [Member] | ||
| Gross Carrying Amount | 1,162,000 | 1,162,000 |
| Accumulated Amortization | 443,348 | 277,348 |
| Net Carrying Value | $ 718,652 | $ 884,652 |
| X | ||||||||||
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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