v3.25.4
Fair Value of Financial Assets and Liabilities - Fair Value Measurements of the Company's Outstanding Series 1 Nonconvertible Preferred Stock (Detail) - Level 3 [Member] - Series 1 Nonconvertible Preferred Stock [Member]
Dec. 31, 2025
Sep. 30, 2025
Probabilities of Payout [Member] | Minimum [Member]    
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]    
Range 0 0
Probabilities of Payout [Member] | Maximum [Member]    
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]    
Range 65 65
Discount Rate [Member]    
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]    
Range 8.25 8.25