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Note 4 - Common and Preferred Unit Distributions (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Feb. 28, 2023
Mar. 31, 2023
Mar. 31, 2022
Allocation to unitholders   $ 6,661 $ 7,500
Preferred Stock Redemption Premium   $ 16,228 (0)
Preferred Units, Number of Redeemed Units (in shares) 47,499 (47,499)  
Feb 2023 Redeemed Units [Member] | Preferred Partner [Member] | Preferred Stock [Member]      
Dividends, Preferred Stock, Cash $ 600    
Common Unitholders And General Partner [Member]      
Allocation to unitholders   $ (6,700) $ (7,500)
Partner, General [Member]      
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest   2.00%