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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2022
Apr. 27, 2023
Jun. 30, 2022
Document Information [Line Items]      
Entity, Registrant Name DORCHESTER MINERALS, L.P.    
Document, Type 10-K/A    
Document, Annual Report true    
Document, Period End Date Dec. 31, 2022    
Current Fiscal Year End Date --12-31    
Document, Fiscal Period Focus FY    
Document, Fiscal Year Focus 2022    
Document, Transition Report false    
Entity, File Number 000-50175    
Entity, Incorporation, State or Country Code DE    
Entity, Tax Identification Number 81-0551518    
Entity, Address, Address Line One 3838 Oak Lawn Avenue, Suite 300    
Entity, Address, City or Town Dallas    
Entity, Address, State or Province TX    
Entity, Address, Postal Zip Code 75219    
City Area Code 214    
Local Phone Number 559-0300    
Title of 12(b) Security Common Units Representing Limited Partnership Interest    
Trading Symbol DMLP    
Security Exchange Name NASDAQ    
Entity, Well-known Seasoned Issuer No    
Entity, Voluntary Filers No    
Entity, Current Reporting Status Yes    
Entity, Interactive Data, Current Yes    
Entity, Filer Category Large Accelerated Filer    
Entity, Small Business false    
Entity, Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity, Shell Company false    
Entity, Public Float     $ 829,229,281
Entity, Common Stock Shares, Outstanding   38,371,493  
Amendment Description Dorchester Minerals, L.P. (the “Partnership”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment No. 1”) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2022 (the “Form 10-K”), which was filed with the U.S. Securities and Exchange Commission (the “SEC”) on February 23, 2023, to provide the information required by Part III of Form 10-K. This information was previously omitted from the Form 10-K in reliance on General Instruction G(3) to Form 10-K, which permits the information in Part III to be incorporated in the Form 10-K by reference from our definitive proxy statement if such statement is filed no later than 120 days after end of our fiscal year. We are filing this Amendment No. 1 to include Part III information in our Form 10-K because we do not expect to file a definitive proxy statement containing this information within 120 days after the end of the fiscal year covered by the Form 10-K. This Amendment No. 1 amends and restates in their entirety Items 10, 11, 12, 13 and 14 of Part III of the Form 10-K.   In addition, as required by Section 302 of the Sarbanes-Oxley Act of 2002 and Rule 12b-15 of the Securities Exchange Act of 1934 (the “Exchange Act”), as amended, updated certifications of the Company’s principal executive officer and principal financial officer are included as Exhibits 31.3 and 31.4 hereto. Because no financial statements have been included in this Amendment No. 1 and this Amendment No. 1 does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4, and 5 of the certifications have been omitted. We are not including the certifications under Section 906 of the Sarbanes-Oxley Act of 2002 as no financial statements are being filed with this Amendment No. 1. This Amendment No. 1 also amends Part IV to add the foregoing certifications.   No other changes have been made to the Form 10-K other than those described above. This Amendment No. 1 does not reflect subsequent events occurring after the original filing date of the Form 10-K in any way other than as required to reflect the amendments discussed above. Accordingly, this Amendment No. 1 should be read in conjunction with the Form 10-K and the Company’s other filings with the SEC subsequent to the filing of the Form 10-K.    
Auditor Name Grant Thornton LLP    
Auditor Location Dallas, Texas    
Auditor Firm ID 248    
Amendment Flag true    
Entity, Central Index Key 0001172358