Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2019
Mar. 09, 2020
Jun. 28, 2019
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Registrant Name MOLECULAR TEMPLATES, INC.    
Entity Central Index Key 0001183765    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity File Number 001-32979    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 94-3409596    
Entity Address, Address Line One 9301 Amberglen Blvd    
Entity Address, Address Line Two Suite 100    
Entity Address, City or Town Austin    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 78729    
City Area Code 512    
Local Phone Number 869-1555    
Entity Public Float     $ 167,590,587
Entity Common Stock, Shares Outstanding   45,647,884  
Title of 12(b) Security Common Stock, $0.001 Par Value Per Share    
Trading Symbol MTEM    
Security Exchange Name NASDAQ    
Document Annual Report true    
Document Transition Report false    
Documents Incorporated by Reference


Portions of the registrant’s definitive proxy statement for the registrant’s 2020 annual meeting of stockholders to be filed pursuant to Regulation 14A within 120 days of the registrant’s fiscal year ended December 31, 2019 are incorporated herein by reference into Part III of this Annual Report on Form 10-K.