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Note 16 - Segment and Related Information - Long-lived Assets by Geographic Area (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Total long-lived assets [1] $ 44,618 $ 50,509
UNITED STATES | Continuing Operations [Member]    
Total long-lived assets 36,568 41,993
GERMANY | Continuing Operations [Member]    
Total long-lived assets 4,958 5,468
Rest of the World [Member] | Continuing Operations [Member]    
Total long-lived assets $ 3,092 $ 3,048
[1] consists of operating lease right-of-use assets, property, plant and equipment, net and amortizable intangible assets, net.