Note 8 - Variable Interest Entities (Details Textual) |
12 Months Ended | |
|---|---|---|
Sep. 30, 2019 |
Dec. 31, 2021 |
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| Sasol-Huntsman [Member] | ||
| Percentage of Joint Venture Acquired | 50.00% | |
| Rubicon LLC [Member] | ||
| Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage | 50.00% | |
| Arabian Amines Company [Member] | ||
| Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage | 50.00% | |
| Sasol-Huntsman [Member] | ||
| Variable Interest Entity, Ownership Percentage Acquired | 50.00% |
| X | ||||||||||
- Definition The percentage of interest acquired in joint venture during the period. No definition available.
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| X | ||||||||||
- Definition Percentage of the Variable Interest Entity's (VIE) voting interest acquired by the reporting entity (directly or indirectly). No definition available.
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| X | ||||||||||
- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
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