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Note 3 - Supplemental Balance Sheet Information (in Thousands) - Goodwill Rollforward (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Balance $ 3,788
Change in goodwill due to impact of foreign currency 4
Balance 3,784
UNITED STATES  
Balance 3,150
Change in goodwill due to impact of foreign currency
Balance 3,150
International [Member]  
Balance 638
Change in goodwill due to impact of foreign currency 4
Balance $ 634