Note 6 - Trade Accounts Receivable - Summary of Trade Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Trade accounts receivable, current	$ 5,541	$ 6,393
Trade accounts receivable, long-term	37	186
Allowance for doubtful accounts	(114)	(25)
Trade accounts receivable, net	5,464	6,554
Unpaid deferred revenue included in trade accounts receivable	$ 2,183	$ 1,891

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section 45
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 45
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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