v3.26.1
Stockholders' Deficit - Summary of Warrants Outstanding (Detail) - $ / shares
 6 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2026
Sep. 30, 2023
Dec. 31, 2025
Mar. 12, 2026
Feb. 26, 2026
Dec. 31, 2024
Dec. 31, 2023
Class of Stock [Line Items]              
Term (years)   5 years 6 months          
Exercise Price $ 0.44   $ 0.88        
Warrants Outstanding 7,434,321   3,525,094 371,057 185,527 93,266 36,766
Contractual life remaining (years) 2 years 7 months 24 days   3 years 1 month 20 days        
SVB Warrants              
Class of Stock [Line Items]              
Issuance Date Jan. 20, 2019   Jan. 20, 2019        
Term (years) 10 years   10 years        
Exercise Price $ 4,848.8   $ 4,848.8        
Warrants Outstanding 92   92     92 92
Contractual life remaining (years) 2 years 7 months 2 days   2 years 29 days        
September 2023 Warrants              
Class of Stock [Line Items]              
Issuance Date Sep. 20, 2023   Sep. 20, 2023        
Term (years) 5 years 6 months   5 years 6 months        
Exercise Price $ 56.43   $ 56.43        
Warrants Outstanding 34,599   34,599     34,599 34,599
Contractual life remaining (years) 2 years 8 months 19 days   3 years 2 months 19 days        
September 2023 Placement Agent Warrants              
Class of Stock [Line Items]              
Issuance Date Sep. 20, 2023   Sep. 20, 2023        
Term (years) 5 years   5 years        
Exercise Price $ 72.26   $ 72.26        
Warrants Outstanding 2,075   2,075     2,075 2,075
Contractual life remaining (years) 2 years 2 months 19 days   2 years 8 months 19 days        
January 2024 Common Stock Warrant              
Class of Stock [Line Items]              
Issuance Date Jan. 09, 2024   Jan. 09, 2024        
Term (years) 5 years   5 years        
Exercise Price $ 12.98   $ 12.98        
Warrants Outstanding 13,636   13,636     13,636 0
Contractual life remaining (years) 2 years 6 months 10 days   3 years 7 days        
January 2024 Pre-Funded Warrant              
Class of Stock [Line Items]              
Issuance Date Jan. 09, 2024   Jan. 09, 2024        
Exercise Price $ 0.11   $ 0.11        
Warrants Outstanding 42,864   42,864 [1]     42,864 0
August 2025 Pre-Funded Warrant              
Class of Stock [Line Items]              
Issuance Date Aug. 20, 2025   Aug. 20, 2025        
Exercise Price $ 0.11   $ 0.11        
Warrants Outstanding 185,528   185,528 [1]     0 0
September 2025 Pre-Funded Warrant              
Class of Stock [Line Items]              
Issuance Date Sep. 25, 2025   Sep. 25, 2025        
Exercise Price $ 0.11   $ 0.11        
Warrants Outstanding 1,743,760   2,318,657 [1]     0 0
December 2025 Pre-Funded Warrant              
Class of Stock [Line Items]              
Issuance Date Dec. 12, 2025   Dec. 12, 2025        
Exercise Price $ 0.11   $ 0.11        
Warrants Outstanding 927,643   927,643 [1]     0 0
February 2026 Pre-Funded Warrants              
Class of Stock [Line Items]              
Issuance Date Feb. 26, 2026            
Exercise Price $ 0.11            
Warrants Outstanding 1,088,067            
March 2026 Pre-Funded Warrants              
Class of Stock [Line Items]              
Issuance Date Mar. 12, 2026            
Exercise Price $ 0.11            
Warrants Outstanding 371,057            
June 2026 Pre-Funded Warrants              
Class of Stock [Line Items]              
Issuance Date Jun. 10, 2026            
Exercise Price $ 0.01            
Warrants Outstanding 3,025,000            
[1] Indicates the perpetual warrants that are excluded from the weighted average remaining contractual life (years) calculation.