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Note 7 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Lease, Cost [Table Text Block]
Year Ended December 31,
 
2020
   
2019
 
                 
Right-of-use asset, net and lease liabilities (in thousands)
  $
2,889
    $
945
 
Cash paid for operating lease liabilities (in thousands)
  $
1,033
    $
563
 
Weighted average remaining lease term (years)
   
3.5
     
1.1
 
Weighted average discount rate
   
3.8
%    
5.5
%
Year Ended December 31,
(in thousands)
 
2020
   
2019
 
Cost of revenue
  $
725
    $
230
 
General and administrative
   
214
     
210
 
Research and development
   
113
     
123
 
Total
  $
1,052
    $
563
 
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
   
Operating Leases
 
   
(In thousands)
 
2021
  $
983
 
2022
   
795
 
2023
   
718
 
2024
   
495
 
Thereafter
   
108
 
Total lease liabilities
  $
3,099