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Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 16, 2025
Apr. 30, 2025
Apr. 28, 2025
Mar. 28, 2025
Feb. 13, 2025
Feb. 12, 2025
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Equity [Line Items]                      
Exercise price per share of warrants (in Dollars per share)             $ 10.95   $ 10.95   $ 11.54
Warrants outstanding period             3 years 5 months 12 days   3 years 5 months 12 days   4 years 3 months 18 days
Proceeds from exercise of warrants                 $ 8,838 $ 32  
Deemed dividend liability                
Intrinsic value of the options outstanding              
The 2025 PIPE Warrants [Member]                      
Equity [Line Items]                      
Purchased shares of common stock (in Shares)       547,737              
March 2025 Warrants [Member]                      
Equity [Line Items]                      
Exercise price per share of warrants (in Dollars per share)       $ 4              
Number of warrants purchases (in Shares)       1              
Warrants outstanding period       3 years              
March 2025 Broker Warrants [Member]                      
Equity [Line Items]                      
Purchased shares of common stock (in Shares)       25,958              
$3.50 Warrants [Member]                      
Equity [Line Items]                      
Number of warrants purchases (in Shares) 400,000                    
Warrants outstanding period 5 years                    
PIPE Warrants [Member]                      
Equity [Line Items]                      
Purchased shares of common stock (in Shares)             823,529   823,529    
Exercise price per share of warrants (in Dollars per share)             $ 6.83   $ 6.83    
Proceeds from exercise of warrants           $ 5,625          
Convertible Promissory Note Warrants [Member]                      
Equity [Line Items]                      
Proceeds from exercise of warrants         $ 3,200            
Conversion of Promissory Note to Common Stock [Member]                      
Equity [Line Items]                      
Convertible shares of common stock (in Shares)         800,000            
Convertible price per share (in Dollars per share)         $ 3            
Transaction costs incurred         $ 39            
Securities Purchase Agreement [Member]                      
Equity [Line Items]                      
Shares issued for offering (in Shares) 340,000                    
Exercise price per share of warrants (in Dollars per share) $ 0.0001                    
Number of warrants purchases (in Shares) 1                    
Units offering price $ 1,200                    
Number of units in equity issuance (in Shares) 400,000                    
Equity offering price per unit (in Dollars per share) $ 3                    
Number of shares (in Shares) 1                    
Number of units issued (in Shares) 400,000                    
Securities Purchase Agreement [Member] | $3.50 Warrants [Member]                      
Equity [Line Items]                      
Exercise price per share of warrants (in Dollars per share) $ 3.5                    
Number of warrants purchases (in Shares) 1                    
Number of shares (in Shares) 1                    
Securities Purchase Agreement [Member] | $4.00 Warrants [Member]                      
Equity [Line Items]                      
Exercise price per share of warrants (in Dollars per share) $ 4                    
Number of warrants purchases (in Shares) 1                    
Warrants outstanding period 5 years                    
Number of shares (in Shares) 1                    
Securities Purchase Agreement [Member] | Pre-funded Warrants [Member]                      
Equity [Line Items]                      
Number of warrants purchases (in Shares) 60,000                    
Securities Purchase Agreement [Member] | $4.00 Warrants [Member]                      
Equity [Line Items]                      
Number of warrants purchases (in Shares) 400,000                    
Share-Based Payment Arrangement, Option [Member]                      
Equity [Line Items]                      
Share-based compensation expense             $ 35 1,296 $ 77 1,314  
Fair value of options granted                 34 1,600  
Unrecognized compensation cost             91   $ 91    
Nonvested options granted over the period                 1 year 6 months    
Restricted Stock Units (RSUs) [Member]                      
Equity [Line Items]                      
Share-based compensation expense             139 $ 210  
Fair value of options granted                 1,478  
Unrecognized compensation cost             1,268   $ 1,268    
Nonvested options granted over the period                 2 years 7 months 17 days    
Deferred Stock Units (DSUS) [Member]                      
Equity [Line Items]                      
Share-based compensation expense             41 $ 210  
Unrecognized compensation cost                  
aiff_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue                 $ 210  
Evoke Neuroscience, Inc. [Member]                      
Equity [Line Items]                      
Number of shares of stock issued (in Shares)   857,142                  
Shares issued, price per share (in Dollars per share)   $ 3.2                  
Private Placement [Member]                      
Equity [Line Items]                      
Shares issued for offering (in Shares)       547,737              
Exercise price per share of warrants (in Dollars per share)       $ 3              
Units offering price       $ 1,643              
Equity offering issuance costs       $ 179              
Inducement Agreement [Member]                      
Equity [Line Items]                      
Shares issued for offering (in Shares)     340,000                
Deemed dividend liability           $ 4,410