v3.26.1
Note 4 - Fair Value Measurement and Fair Value of Financial Instruments (Tables)
9 Months Ended
Jun. 30, 2026
Notes Tables  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
  

As of June 30, 2026

  

As of September 30, 2025

 
  

Series D Preferred

  

Montage Capital

  

Series D Preferred

 

Volatility

  68.7%  51.0%  72.1%

Risk-free rate

  3.5%  4.8%  3.7%

Stock price

 $1.16  $1.32  $1.32 
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

As of June 30, 2026

     
  

Level 1

  

Level 2

  

Level 3

  

Total

 
                 

Liabilities:

                

Warrant liabilities:

                

Series D

 $-  $-  $6  $6 

Total warrant liabilities

 $-  $-  $6  $6 
  

As of September 30, 2025

     
  

Level 1

  

Level 2

  

Level 3

  

Total

 
                 

Liabilities:

                

Warrant liabilities:

                

Montage

 $-  $-  $2  $2 

Series D

  -   -   100   100 

Total warrant liabilities

 $-  $-  $102  $102 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Warrant Liabilities

 

Balance at beginning of period, September 30, 2025

 $102 

Additions

  - 

Payments, exercises or expirations

  - 

Adjustment to fair value

  (90)

Balance at end of period, December 31, 2025

 $12 

Additions

  - 

Payments, exercises or expirations

  - 

Adjustment to fair value

  (4)

Balance at end of period, March 31, 2026

 $8 

Additions

  - 

Exercises or payments

  - 

Adjustment to fair value

  (2)

Balance at end of period, June 30, 2026

 $6