v3.26.1
Cover Page - shares
 3 Months Ended
Mar. 31, 2026
May 01, 2026
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Mar. 31, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31  
Entity Registrant Name MONTAUK RENEWABLES, INC.  
Securities Act File Number 001-39919  
Entity Incorporation, State or Country Code DE  
Entity Interactive Data Current Yes  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Filer Category Accelerated Filer  
Entity Tax Identification Number 85-3189583  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Address, Address Line One 5313 Campbells Run Road  
Entity Address, Address Line Two Suite 200  
Entity Address, State or Province PA  
Entity Address, City or Town Pittsburgh  
Entity Address, Postal Zip Code 15205  
City Area Code 412  
Local Phone Number 747-8700  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol MNTK  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   142,341,139
Entity Central Index Key 0001826600  
Entity Ex Transition Period false