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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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Total share-based compensation expense	$ 1,201	$ 1,281	$ 2,432	$ 3,678
Share-based compensation capitalized in intangible assets	30	47	71	86
Total share-based compensation	1,231	1,328	2,503	3,764
Selling and Marketing Expense [Member]
Total share-based compensation expense	209	269	372	487
Research and Development Expense [Member]
Total share-based compensation expense	233	286	501	523
General and Administrative Expense [Member]
Total share-based compensation expense	$ 759	$ 726	$ 1,559	$ 2,668

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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