Note 7 - Investment in Unconsolidated Affiliates (Details Textual) - BASF Huntsman Shanghai Isocyanate Investment BV [Member]	Dec. 31, 2021	Dec. 31, 2020
Equity Method Investment, Ownership Percentage	50.00%	50.00%
SLIC [Member]
Ownership Interest Held by Equity Method Investee	70.00%
Indirect Ownership Percentage	35.00%

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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