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Note 2 - Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

Balance as of December 31, 2022

 $984 

Amounts accrued

  318 

Write-offs charged against the allowance

  (228)

Balance as of September 30, 2023

 $1,074 
Schedule of Inventory, Current [Table Text Block]
  

September 30,

  

December 31,

 
  

2023

  

2022

 

Raw materials, net of reserve

 $1,745  $1,671 

Work-in-process

  561   596 

Total inventories

 $2,306  $2,267