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Note 15 - Segment and Related Information - Long-lived Assets by Geographic Area (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Total long-lived assets [1] $ 37,459 $ 44,618
UNITED STATES | Continuing Operations [Member]    
Total long-lived assets 31,512 36,568
GERMANY | Continuing Operations [Member]    
Total long-lived assets 3,501 4,958
Rest of the World [Member] | Continuing Operations [Member]    
Total long-lived assets $ 2,446 $ 3,092
[1] consists of operating lease right-of-use assets, property, plant and equipment, net and amortizable intangible assets, net.