Note 5 - Revisions in Estimates (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Gross Profit, Total	$ 23,799	$ 1,138
Estimated Cost Recovery of Customer Affirmative Claims and Back Charges [Member]
Gross Profit, Total			$ 5,000	$ 5,000

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

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+ Details