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Note 16 - Segment and Related Information (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Revenue from External Customers by Geographic Areas [Table Text Block]
  

Year Ended December 31,

 

(in thousands)

 

2022

  

2021

 

United States

 $49,912  $49,831 

Europe

  30,687   35,767 

Greater China

  16,393   13,496 

Rest of the world

  16,343   19,810 

Total revenues

 $113,335  $118,904 
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]
  

December 31,

 

(in thousands)

 

2022

  

2021

 

United States

 $26,051  $31,512 

Germany

  2,432   3,501 

Rest of the world

  1,489   2,446 

Total long-lived assets

 $29,972  $37,459 
Schedule of Net Assets By Geographic Areas [Table Text Block]
  

December 31,

 

(in thousands)

 

2022

  

2021

 

United States

 $34,408  $38,641 

Germany

  14,761   15,501 

United Kingdom

  10,116   13,999 

Rest of the world

  12,935   15,260 

Total net assets

 $72,220  $83,401