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Note 15 - Significant Customers / Concentration (Details Textual) - Geographic Concentration Risk [Member] - Assets, Total [Member]	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
DENMARK
Concentration Risk, Percentage	65.00%	61.00%
UNITED STATES
Concentration Risk, Percentage	33.00%	26.00%
CHINA
Concentration Risk, Percentage	2.00%	13.00%

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Publisher FASB
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-Topic 275
-SubTopic 10
-Section 50
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-URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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