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Note 16 - Revenues - Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Balance	$ 3,949	$ 3,820
Deferral of revenue	531	956
Recognition of deferred revenue	(821)	(1,071)
Effect of foreign currency translation	14	10
Balance	3,673	3,715
Service [Member]
Balance	1,587	1,659
Deferral of revenue	308	845
Recognition of deferred revenue	(499)	(848)
Effect of foreign currency translation	14	10
Balance	1,410	1,666
Customer Advances [Member]
Balance	2,362	2,161
Deferral of revenue	223	111
Recognition of deferred revenue	(322)	(223)
Effect of foreign currency translation
Balance	$ 2,263	$ 2,049

X

- Definition

Amount of deferred income and obligation included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

No definition available.

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
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+ References

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-Section 50
-Paragraph 10
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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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