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Note 4 - Accrued Liabilities (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
  

September 30, 2022

  

December 31, 2021

 

Salary and payroll tax accrual

 $12,990  $16,994 

Taxes payable

  3,973   4,016 

Current portion of operating lease liability

  2,231   2,137 

License fee obligation

  1,000   1,000 

Placement fees payable

  6,314   6,314 

Accrued other

  9,159   8,704 

Total accrued liabilities

 $35,667  $39,165