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Note 8 - Share-based Compensation - Share-based Compensation Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Total share-based compensation expense	$ 1,170	$ 2,790	$ 4,848	$ 8,019
Share-based compensation capitalized in intangible assets	34	22	120	67
Total share-based compensation	1,204	2,812	4,968	8,086
Selling and Marketing Expense [Member]
Total share-based compensation expense	172	292	659	821
Research and Development Expense [Member]
Total share-based compensation expense	291	278	814	800
General and Administrative Expense [Member]
Total share-based compensation expense	$ 707	$ 2,220	$ 3,375	$ 6,398

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

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Amount of cost expensed and capitalized for award under share-based payment arrangement.

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