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Note 8 - Related Party Transactions (Tables) | 6 Months Ended
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Jun. 30, 2023
Notes Tables |
Schedule of Related Party Transactions [Table Text Block] |
|  | June 30, |  |  | December 31, |
|  | 2023 |  |  | 2022 |
Loans from joint venture partners(1): |  |  |  |  |  |  |  |
China |  | $ | 1,554 |  |  | $ | 1,382 |
Mexico |  |  | 623 |  |  |  | 623 |
Australia |  |  | 636 |  |  |  | 693 |
Resource Plus |  |  | 266 |  |  |  | 266 |
Total due to affiliates |  | $ | 3,079 |  |  | $ | 2,964 |

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration