v3.26.1
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Jul. 31, 2026
Document Information [Line Items]    
Entity Registrant Name FTC SOLAR, INC.  
Entity Central Index Key 0001828161  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Interactive Data Current Yes  
Entity Current Reporting Status Yes  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Document Type 10-Q  
Document Period End Date Jun. 30, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Trading Symbol FTCI  
Amendment Flag false  
Title of 12(b) Security Common Stock, $0.0001 par value  
Security Exchange Name NASDAQ  
Entity File Number 001-40350  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 81-4816270  
Entity Address, Address Line One 10900 Stonelake Blvd  
Entity Address, Address Line Two Suite 100  
Entity Address, Address Line Three Quarry Oaks II Building  
Entity Address, City or Town Austin  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 78759  
City Area Code 512  
Local Phone Number 481-4271  
Entity Common Stock, Shares Outstanding   16,461,251
Document Quarterly Report true  
Document Transition Report false