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Note 8 - Related-party Transactions - Transactions Between the Company and Affiliates (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Due to affiliates	[1]	$ 623	$ 3,205
Loans Due to Affiliates [Member] | Local Investors in Mexico [Member]
Due to affiliates	[1]	623	623
Loans Due to Affiliates [Member] | Local Investors in China [Member]
Due to affiliates	[1]	0
Loans Due to Affiliates [Member] | Local Investors Related to Resource Plus [Member]
Due to affiliates	[1]	$ 0	266
Loans Due from Affiliates [Member] | Local Investors in China [Member]
Due to affiliates	[1]		$ 2,316
[1] Represent loans due from the local investors into the Company's subsidiaries (representing their proportionate share of working capital loans). The loans have no payment terms, are due on demand, and are classified as current liabilities in the unaudited condensed consolidated balance sheets.

X

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(15)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(15)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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