v3.26.1
Note 8 - Stockholders' Equity (Tables)
9 Months Ended
Jun. 30, 2026
Notes Tables  
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]
  

Three Months Ended June 30,

  

Nine Months Ended June 30,

 
  

2026

  

2025

  

2026

  

2025

 

Operating expenses

 $120  $152  $329  $366 

Interest expense and other, net

  -   122   -   122 

Total

 $120  $274  $329  $488 
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

Type

 

Issue Date

 

Shares

  

Price

 

Expiration

Investors

 

5/14/2021

  592,106  $2.51 

11/16/2026

Placement Agent

 

3/26/2025

  70,000  $1.88 

3/24/2030

     662,106      
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
  

2026

 
  

Non-Board

 

Weighted-average fair value per share option

 $0.72 

Expected life (in years)

  5.8 

Volatility

  100.2%

Risk-free interest rate

  4.0%

Dividend yield

  0.0%
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
  

Stock Options

  

Stock Warrants

 
  

Awards

  

Weighted Average Exercise Price

  

Warrants

  

Weighted Average Exercise Price

 

Outstanding, September 30, 2025

  1,988,677  $1.99   861,533  $2.77 

Granted

  260,000   0.82   -   - 

Exercised or redeemed

  (1,000)  0.81   -   - 

Forfeited

  (110,340)  1.23   -   - 

Expired

  (48)  227.50   (199,427)  3.87 

Outstanding, June 30, 2026

  2,137,289  $1.89   662,106  $2.24 

Options vested and exercisable, June 30, 2026

  1,768,949  $2.08         
Schedule of Nonvested Share Activity [Table Text Block]
      

Weighted Average

 
      

Grant-Date

 
  

Shares

  

Fair Value

 

Unvested at October 1, 2025

  191,210  $1.40 

Granted

  375,165   0.82 

Vested

  (112,172)  1.13 

Cancelled/Forfeited

  -   - 

Unvested at June 30, 2026

  454,203  $0.99