Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Apr. 22, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Document Transition Report false    
Entity File Number 001-32979    
Entity Registrant Name MOLECULAR TEMPLATES, INC.    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 9301 Amberglen Blvd, Suite 100    
Entity Address, City or Town Austin    
Entity Address, State or Province TX    
Entity Tax Identification Number 94-3409596    
Entity Address, Postal Zip Code 78729    
City Area Code 512    
Local Phone Number 869-1555    
Title of 12(b) Security Common Stock, $0.001 Par Value Per Share    
Trading Symbol MTEM    
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 Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction Flag false    
Entity Shell Company false    
Entity Public Float     $ 18.0
Entity Common Stock, Shares Outstanding   6,583,880  
Auditor Name Ernst & Young LLP    
Auditor Firm ID 42    
Auditor Location Austin, Texas    
Documents Incorporated by Reference



Entity Central Index Key 0001183765    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false