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Note 1 - Nature of Business, Financial Condition and Basis of Presentation (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
   
December 31, 2019
   
Additions
   
Payments
   
March 31, 2020
 
                                 
Severance (including payroll taxes)
  $
    $
96
    $
    $
96
 
Lease agreements
   
     
203
     
     
203
 
                                 
Total
  $
    $
299
    $
    $
299