XML 40 R19.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Note 1 - Business and Basis of Presentation (Details Textual) | Dec. 31, 2023
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Number Of Counties In Which Entity Operates | 593
Number of States in which Entity Operates | 28

X
- Definition The number of counties the entity operates in. + References No definition available. + Details
Name: | dmlp_NumberOfCountiesInWhichEntityOperates
Namespace Prefix: | dmlp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant