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Note 13 - Share-based Compensation - Share-based Compensation Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Total share-based compensation expense $ 10,341 $ 30,393
Share-based compensation capitalized in intangible assets 10,430 30,997
Continuing Operations [Member]    
Share-based compensation capitalized in intangible assets 89 423
Continuing Operations [Member] | Selling and Marketing Expense [Member]    
Total share-based compensation expense 971 2,856
Continuing Operations [Member] | Research and Development Expense [Member]    
Total share-based compensation expense 889 676
Continuing Operations [Member] | General and Administrative Expense [Member]    
Total share-based compensation expense 8,481 5,740
Continuing Operations [Member] | Spin-off Transaction Costs [Member]    
Total share-based compensation expense 5,409
Discontinued Operations [Member]    
Total share-based compensation expense 15,712
Share-based compensation capitalized in intangible assets $ 181