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Note 8 - Share-based Compensation - Share-based Compensation Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Total share-based compensation expense	$ 1,281	$ 2,954	$ 3,678	$ 5,229
Share-based compensation capitalized in intangible assets	47	30	86	45
Total share-based compensation	1,328	2,984	3,764	5,274
Selling and Marketing Expense [Member]
Total share-based compensation expense	269	160	487	529
Research and Development Expense [Member]
Total share-based compensation expense	286	277	523	522
General and Administrative Expense [Member]
Total share-based compensation expense	$ 726	$ 2,517	$ 2,668	$ 4,178

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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