Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Acquisition (Details Textual)

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Note 2 - Acquisition (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Apr. 06, 2018
Sep. 30, 2018
Sep. 30, 2018
Dec. 31, 2017
Contract with Customer, Liability, Total   $ 12,313,000 $ 12,313,000 $ 11,547,000
Customer Relationships [Member]        
Finite-Lived Intangible Asset, Useful Life     2 years  
Assets and Franchise Agreement [Member]        
Business Combination, Consideration Transferred, Total $ 100,000      
Contract with Customer, Liability, Total 12,998 12,998 $ 12,998  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Including Bargain Purchase Gain 87,002      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 129,000 129,000 129,000  
Assets and Franchise Agreement [Member] | Franchise Rights [Member]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 85,000      
Finite-Lived Intangible Asset, Useful Life 4 years      
Assets and Franchise Agreement [Member] | Customer Relationships [Member]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 44,000      
Finite-Lived Intangible Asset, Useful Life 2 years      
Assets and Franchise Agreement [Member] | General and Administrative Expense [Member]        
Business Combination, Acquisition Related Costs $ 3,250      
Assets and Franchise Agreement [Member] | Revenue, Net [Member]        
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual   67,000 129,000  
Assets and Franchise Agreement [Member] | Net Income [Member]        
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual     $ 40,000  
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual   $ 23,000