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Note 20 - Commitments and Contingencies (Details Textual)
$ in Thousands, ¥ in Millions
12 Months Ended
Nov. 05, 2021
USD ($)
Nov. 05, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2019
USD ($)
Equity Securities without Readily Determinable Fair Value, Amount     $ 2,280 $ 67   $ 35
Payments to Acquire Long-term Investments     $ 2,263 $ 28    
Shenzhen Global Best Products Import & Export Co. [Member]            
Equity Securities without Readily Determinable Fair Value, Percent     9.09%   9.09%  
Equity Securities without Readily Determinable Fair Value, Amount     $ 780   ¥ 5  
Payments to Acquire Long-term Investments $ 310 ¥ 2