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Note 3 - Accounts Receivable (Tables)
3 Months Ended
Dec. 31, 2023
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
  As of December 31, 2023  As of September 30, 2023 

Accounts receivable

 $1,446  $1,184 

Allowance for credit losses

  (195)  (180)

Accounts receivable, net

 $1,251  $1,004 
Accounts Receivable, Allowance for Credit Loss [Table Text Block]

Balance as of October 1, 2023

 $180 

Credit loss expense (recovery)

  15 

Write-off/adjustments

  - 

Balance as of December 31, 2023

 $195