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Note 6 - Goodwill and Intangibles - Goodwill (Details) - USD ($) $ in Thousands		1 Months Ended			3 Months Ended	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2019	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Balance at the beginning of period					$ 74,748	$ 74,748	$ 77,832
Goodwill impairment	$ 0	$ 0	$ 0			(500)	(3,000)
Balance at the end of period						74,066	74,748
Asset held-for-sale \| Bates Companies
Sale						(182)
Bates Companies
Acquisition - measurement period adjustment							(84)
Goodwill impairment				$ (3,000)	$ (500)	$ (500)	$ (3,000)