Note 15 - Partners' Capital (Predecessors) (Details Textual) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)
HPK, LP [Member]
Net Income (Loss) Allocated to Limited Partners	$ 80.8

Aggregate amount of net income allocated to limited partners.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

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