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Note 5 - Accrued Liabilities
9 Months Ended
Sep. 30, 2019
Notes to Financial Statements  
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
NOTE
5.
ACCRUED LIABILITIES
Accrued liabilities consist of the following (in thousands):
 
   
September 30, 2019
   
December 31, 2018
 
Salary and payroll tax accrual
  $
8,302
    $
13,393
 
Taxes payable
   
4,384
     
3,437
 
Current portion of operating lease liability
   
2,117
     
-
 
License fee obligation
   
1,000
     
1,000
 
Placement fees payable
   
8,738
     
2,490
 
Accrued other
   
9,271
     
6,339
 
Total accrued liabilities
  $
33,812
    $
26,659