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Note 16 - Segment and Related Information - Net Assets by Geographic Area (Details) - Continuing Operations [Member] - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Total net assets $ 72,220 $ 83,401
UNITED STATES    
Total net assets 34,408 38,641
GERMANY    
Total net assets 14,761 15,501
UNITED KINGDOM    
Total net assets 10,116 13,999
Rest of the World [Member]    
Total net assets $ 12,935 $ 15,260