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Note 15 - Segment and Related Information (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Revenue from External Customers by Geographic Areas [Table Text Block]
   

Year Ended December 31,

 

(in thousands)

 

2021

   

2020

 

United States

  $ 49,831     $ 42,054  

Europe

    35,767       29,938  

Asia

    24,816       23,884  

Rest of World

    8,490       6,224  

Total revenues

  $ 118,904     $ 102,100  
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]
  

December 31,

 

(in thousands)

 

2021

  

2020

 

United States

 $31,512  $36,568 

Germany

  3,501   4,958 

Rest of World

  2,446   3,092 

Total long-lived assets

 $37,459  $44,618 
Schedule of Net Assets By Geographic Areas [Table Text Block]
  

December 31,

 

(in thousands)

 

2021

  

2020

 

United States

 $38,641  $32,457 

Germany

  15,501   18,697 

United Kingdom

  13,999   8,867 

Rest of World

  15,260   16,660 

Total net assets

 $83,401  $76,681