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Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		8 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 01, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2020
Income Tax Expense (Benefit), Total	$ (668)	$ 0		$ (1,352)	$ 0
Revenue from Contract with Customer, Including Assessed Tax	$ 10,549	$ 0		$ 38,728	$ 0
Effective Income Tax Rate Reconciliation, Percent, Total	(20.90%)	0.00%		12.60%	0.00%
Domestic Tax Authority [Member] | Canada Revenue Agency [Member]
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent			27.00%
Forecast [Member]
Effective Income Tax Rate Reconciliation, Percent, Total						8.00%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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