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Note 9 - Capital Stock and Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based compensation	$ 769	$ 615	$ 1,562	$ 1,206
Continuing Operations [Member] | Cost of Sales [Member]
Share-based compensation	14	8	24	21
Continuing Operations [Member] | Selling and Marketing Expense [Member]
Share-based compensation	62	36	113	29
Continuing Operations [Member] | General and Administrative Expense [Member]
Share-based compensation	645	529	1,341	1,080
Continuing Operations [Member] | Research and Development Expense [Member]
Share-based compensation	$ 48	$ 42	$ 84	$ 76

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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