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Note 5 - Revisions in Estimates (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Gross Profit, Total	$ 125,997	$ 122,558	$ 238,139	$ 170,454
Estimated Cost Recovery of Customer Affirmative Claims and Back Charges [Member]
Gross Profit, Total					$ 5,000	$ 5,000

X

- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

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