Note 5 - Receivables and Allowance for Credit Losses - Receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accounts receivable–trade	$ 46,627	$ 39,903
Less allowance for credit losses	(445)	(519)
Receivables, net	$ 46,182	$ 39,384

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
-Topic 310
-SubTopic 10
-Section 45
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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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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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Balance Type:	debit
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