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Note 5 - Allowance for Doubtful Accounts (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Financing Receivable, Current, Allowance for Credit Loss [Table Text Block]
  

For the Year Ended December 31,

 
  

2022

  

2021

 

Balance at beginning of period

 $47  $473 

Bad debt expense

     9 

Write-offs

     (229)

Other adjustments

  (30)  (206)

Balance at end of period

 $17  $47