v3.26.1
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 07, 2026
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2026  
Entity File Number 001-42914  
Entity Registrant Name MapLight Therapeutics, Inc.  
Entity Central Index Key 0001770069  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 83-2163243  
Entity Address, Address Line One 800 Chesapeake Drive  
Entity Address, City or Town Redwood City  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94063  
City Area Code 617  
Title of 12(b) Security Voting Common Stock, par value $0.0001 per share  
Local Phone Number 984-6300  
Trading Symbol MPLT  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Voting Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   43,650,321
Non-voting Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   2,727,511