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Note 5 - Stock Options and Warrants (Tables)
3 Months Ended
Mar. 31, 2018
Stock Options And Warrants Tables  
Summary of the stock option activity
   Number of Options  Weighted Average Exercise Price
 Outstanding, December 31, 2017    1,246   $1,428.00 
 Granted    —      —   
 Exercised    —      —   
 Expired    —      —   
 Outstanding, March 31, 2018    1,246   $1,428.00 
 Exercisable, March 31, 2018    1,246   $1,428.00 
Summary of the warrant activity
   Number of Warrants  Weighted Average Exercise Price
Outstanding at December 31, 2017:  —      $ —    
 Granted    1,694,440    4.58 
 Forfeited    —      —   
 Exercised    —      —   
 Outstanding at March 31, 2018    1,694,440   $4.58 
 Exercisable at March 31, 2018    1,694,440   $4.58