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Note 2 - Acquisitions for Units (Details Textual) $ in Thousands |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Sep. 30, 2022 USD ($) a shares | Mar. 31, 2022 USD ($) a shares | Dec. 31, 2021 USD ($) a shares | Jun. 30, 2021 USD ($) a shares | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) a
Number Of Counties In Which Entity Operates |  |  |  |  | 592 |
Oil and Gas Property, Full Cost Method, Net, Total |  |  | $ 98,319 |  | $ 112,250 | $ 98,319
Royalty Interests in Bakken Trend [Member] | Partnership Interest [Member] |  |  |  |  |  |
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable, Number of Shares (in shares) | shares |  |  |  | 725,000 |  |
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable |  |  |  | $ 12,200 |  |
Asset Acquisition Consideration Transferred Royalty and Mineral Revenue Received |  |  |  |  |  | 700
Oil and Gas Property, Full Cost Method, Net, Total |  |  | $ 11,500 |  |  | $ 11,500
Excess Energy, LLC [Member] | dmlp_Mineral And Royalty Interest [Member] |  |  |  |  |  |
Area of Real Estate Property (Acre) | a | 2,100 |  |  |  |  |
Number Of Counties In Which Entity Operates | 12 |  |  |  |  |
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable, Number of Shares (in shares) | shares | 816,719 |  |  |  |  |
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable | $ 20,400 |  |  |  |  |
Asset Acquisition Consideration Transferred Royalty and Mineral Revenue Received |  |  |  |  | 900 |
Oil and Gas Property, Full Cost Method, Net, Total |  |  |  |  | 19,000 |
Costs Incurred, Acquisition of Unproved Oil and Gas Properties |  |  |  |  | 1,800 |
Unrelated Third Parties [Member] | dmlp_Mineral And Royalty Interest [Member] |  |  |  |  |  |
Area of Real Estate Property (Acre) | a |  | 3,600 |  |  |  |
Number Of Counties In Which Entity Operates |  | 13 |  |  |  |
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable, Number of Shares (in shares) | shares |  | 570,000 |  |  |  |
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable |  | $ 14,800 |  |  |  |
Asset Acquisition Consideration Transferred Royalty and Mineral Revenue Received |  |  |  |  | 800 |
Oil and Gas Property, Full Cost Method, Net, Total |  |  |  |  | 14,000 |
Gemini 5 Thirty, LP [Member] | dmlp_Mineral And Royalty Interest [Member] |  |  |  |  |  |
Area of Real Estate Property (Acre) | a |  |  | 4,600 |  |  | 4,600
Number Of Counties In Which Entity Operates |  |  | 27 |  |  | 27
Gemini 5 Thirty, LP [Member] | Mineral and Royalty Interests [Member] |  |  |  |  |  |
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable, Number of Shares (in shares) | shares |  |  | 1,580,000 |  |  |
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable |  |  | $ 31,300 |  |  |
Asset Acquisition Consideration Transferred Royalty and Mineral Revenue Received |  |  |  |  | $ 400 | $ 1,600
Oil and Gas Property, Full Cost Method, Net, Total |  |  | $ 29,300 |  |  | $ 29,300
JSFM, LLC [Member] | Property Located in Dunn, McKenzie, McLean and Mountrail Counties, North Dakota [Member] |  |  |  |  |  |
Area of Real Estate Property (Acre) | a |  |  |  | 6,400 |  |

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