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Note 6 - Related-party Transactions - Transactions Between the Company and Affiliates (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Due to affiliates		$ 2,979	$ 3,270
Loans Due to Affiliates [Member] | Local Investors in Australia [Member]
Due to affiliates	[1]	571	597
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		1,519
Loans Due to Affiliates [Member] | Local Investors Related to Resource Plus [Member]
Due to affiliates	[1]	$ 266	266
Loans Due from Affiliates [Member] | Local Investors in China [Member]
Due to affiliates			$ 1,784
[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 Company's consolidated financial statements.

X

- Definition

Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a)(5))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(12)(b)(3))
-URI https://asc.fasb.org/extlink&oid=120401414&loc=d3e603758-122996

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