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Note 4 - Fair Value Measurement and Fair Value of Financial Instruments (Tables)
3 Months Ended
Dec. 31, 2023
Notes Tables  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
  

As of December 31, 2023

  

As of September 30, 2023

 
  Montage Capital  Series C Preferred  Series D Preferred  Montage Capital  Series C Preferred  Series D Preferred 

Volatility

  56.8%  49.3%  72.1%  60.7%  51.7%  73.6%

Risk-free rate

  4.4%  5.1%  4.0%  5.0%  5.5%  4.8%

Stock price

 $0.87  $0.87  $0.87  $0.83  $0.83  $0.83 
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

As of December 31, 2023

     
  

Level 1

  

Level 2

  

Level 3

  

Total

 
                 

Liabilities:

                

Warrant liabilities:

                

Montage

 $-  $-  $12  $12 

Series A and C

  -   -   11   11 

Series D

  -   -   133   133 

Total warrant liabilities

 $-  $-  $156  $156 
  

As of September 30, 2023

     
  

Level 1

  

Level 2

  

Level 3

  

Total

 
                 

Assets:

                

Goodwill, net

 $-  $-  $8,468  $8,468 

Liabilities:

                

Warrant liabilities:

                

Montage

  -   -   12   12 

Series A and C

  -   -   11   11 

Series D

  -   -   151   151 

Total warrant liabilities

 $-  $-  $174  $174 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Warrant Liabilities

 

Balance at beginning of period, October 1, 2023

 $174 

Additions

  - 

Payments or exercises

  - 

Adjustment to fair value

  (18)

Balance at end of period, December 31, 2023

 $156