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Note 5 - Shareholders' Equity - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Stock-based compensation expense	$ 918	$ 862	$ 2,609	$ 2,260
Cost of Sales [Member]
Stock-based compensation expense	44	31	126	82
Product Development [Member]
Stock-based compensation expense	151	111	428	329
Selling and Marketing Expense [Member]
Stock-based compensation expense	98	76	283	217
General and Administrative Expense [Member]
Stock-based compensation expense	$ 625	$ 644	$ 1,772	$ 1,632

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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