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Note 22 - Segment and Related Information - Net Assets by Geographic Area (Details) - Continuing Operations [Member] - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Total net assets $ 81,694 $ 82,724
UNITED STATES    
Total net assets 37,726 38,921
GERMANY    
Total net assets 17,340 17,261
UNITED KINGDOM    
Total net assets 11,254 10,473
Rest of the World [Member]    
Total net assets $ 15,374 $ 16,069