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Note 12 - Geographic Information and Major Customer and Product Data - Revenues Based On Customer Location (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 87,152		$ 77,877	$ 87,507
UNITED STATES
Revenues	16,627		8,354	7,188
Europe and Middle East [Member]
Revenues	21,493		17,370	11,007
Asia Pacific [Member]
Revenues	49,032		52,153	69,312
CHINA
Revenues	33,233		33,672	41,059
KOREA, REPUBLIC OF
Revenues		[1]	7,989	17,842
GERMANY
Revenues	$ 16,100		$ 13,873		[1]
[1] Less than 10%

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

+ Details

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