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Note 9 - Share-based Compensation - Schedule of Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based compensation expense	$ 74	$ 137
Cost of Sales [Member]
Share-based compensation expense	2	5
Selling and Marketing Expense [Member]
Share-based compensation expense	1	10
Research and Development Expense [Member]
Share-based compensation expense	12	30
General and Administrative Expense [Member]
Share-based compensation expense	$ 59	$ 92

X

- Definition

Amount of noncash expense for share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

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- Details

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- Details

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