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Note 10 - Stockholders’ Equity (Details) - Schedule of Stockholders' Equity Note, Warrants or Rights - $ / shares
 9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Schedule of Stockholders' Equity Note, Warrants or Rights [Abstract]    
Number of Warrants Outstanding   858,334
Warrants Outstanding, Average Exercise Price $ 2.71 $ 2.71
Warrants Outstanding, Weighted Average Remaining Contractual Term in Years 2 years 62 days 2 years 335 days
Number of Warrants Exercisable   858,334
Warrants Exercisable, Average Exercise Price $ 2.71 $ 2.71
Warrants Exercisable, Weighted Average Remaining Contractual Term in Years 2 years 62 days 2 years 335 days
Number of Warrants Granted 0  
Warrants Granted, Average Exercise Price $ 0  
Number of Warrants Exercised 0  
Warrants Exercised, Average Exercise Price $ 0  
Number of Warrants Expired 0  
Warrants Expired, Average Exercise Price $ 0  
Number of Warrants Outstanding 858,334  
Number of Warrants Exercisable 858,334