Note 18 - Geographic Revenue and Long-lived Assets Distribution (Details Textual)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Number of Geographies in which the Company Operates	3
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member] \| Asia [Member]
Concentration Risk, Percentage	58.00%	48.00%
Geographic Concentration Risk [Member] \| Revenue Benchmark [Member] \| JAPAN
Concentration Risk, Percentage	39.00%	50.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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