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Note 11 - Partners' Capital (Details Textual) - USD ($)
$ / shares in Units, shares in Millions
6 Months Ended
May 15, 2017
May 09, 2017
Jun. 30, 2017
Jun. 30, 2016
Net Loss, Percent Allocated to General Partner     1.00%  
Net Loss, Percentage Allocated to Class A Unit Holders     99.00%  
Proceeds from Rights Offering     $ 19,869,000
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest 1.00%      
General Partner [Member]        
Partners' Capital Account, Contributions $ 201,000      
Limited Partners Class A Units [Member]        
Limited Partners' Capital Account, Units Outstanding 22.2      
Rights to Purchase Class A Units [Member]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   11.1    
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 1.79    
Proceeds from Rights Offering   $ 19,869,000,000