v3.25.2
Revised Financial Statements - Schedule of Condensed Consolidated Statement of Operations and Comprehensive Loss (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Change in fair value of earnout liability $ 210,000 $ 310,000 $ 160,000 $ 2,920,000
Net loss and comprehensive loss attributable to QT Imaging Holdings, Inc. (4,001,515) (1,248,874) (15,137,515) (1,877,464)
Net loss and comprehensive loss attributable to common stockholders $ (4,001,515) $ (6,434,376) $ (15,137,515) $ (7,062,966)
Net loss per share, basic (in dollars per share) $ (0.14) $ (0.30) $ (0.54) $ (0.41)
Net loss per share, diluted (in dollars per share) $ (0.14) $ (0.30) $ (0.54) $ (0.41)
As Filed        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Change in fair value of earnout liability       $ (750,000)
Net loss and comprehensive loss attributable to QT Imaging Holdings, Inc.       (5,547,464)
Net loss and comprehensive loss attributable to common stockholders       $ (10,732,966)
Net loss per share, basic (in dollars per share)       $ (0.62)
Net loss per share, diluted (in dollars per share)       $ (0.62)
Adjustments        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Change in fair value of earnout liability       $ 3,670,000
Net loss and comprehensive loss attributable to QT Imaging Holdings, Inc.       3,670,000
Net loss and comprehensive loss attributable to common stockholders       $ 3,670,000
Net loss per share, basic (in dollars per share)       $ 0.21
Net loss per share, diluted (in dollars per share)       $ 0.21