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Note 10 - Segment Information (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Number of Reportable Segments			2
Revenue from Contract with Customer, Including Assessed Tax	$ 67,423	$ 58,865		$ 195,696	$ 171,157
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 0	$ 0		$ 0	$ 0

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

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