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Note 1 - Business and Basis of Presentation (Details Textual) shares in Thousands	3 Months Ended
	Mar. 31, 2024 shares
Number Of Counties In Which Entity Operates	594
Number of States in which Entity Operates	28
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	0

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

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

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