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Note 9 - Stock-based Compensation - Schedule of Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Stock-based compensation expense	$ 48	$ 112	$ 177	$ 379
Cost of Sales [Member]
Stock-based compensation expense	2	3	6	12
Selling and Marketing Expense [Member]
Stock-based compensation expense		8	1	28
Research and Development Expense [Member]
Stock-based compensation expense	11	23	34	81
General and Administrative Expense [Member]
Stock-based compensation expense	$ 35	$ 78	$ 136	$ 258

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

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