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Note 7 - Investment Properties (Details Textual) ¥ in Thousands, $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 10, 2024 USD ($) | Feb. 01, 2023 USD ($) | Feb. 01, 2023 CNY (¥) | Jul. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Jun. 30, 2010 USD ($) | Jun. 30, 2010 CNY (¥) | Jun. 30, 2024 USD ($) | Jun. 30, 2024 CNY (¥)
Mao Ye [Member] |  |  |  |  |  |  |  |  |  |  |  |
Operating Lease, Lease Income |  |  |  |  | $ 6 | $ 6 | $ 12 | $ 12 |  |  |  |
Monthly Lease Revenue Amount |  | $ 2 | ¥ 15 |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  | 3 | 4 | 7 | 8 |  |  |  |
Real Estate Investments, Net |  |  |  |  | 46 |  | 46 |  |  |  | $ 53 |
Jiang Huai [Member] |  |  |  |  |  |  |  |  |  |  |  |
Operating Lease, Lease Income |  |  |  |  | 0 | 0 | 0 | 0 |  |  |  |
Depreciation |  |  |  |  | 6 | 6 | 12 | 12 |  |  |  |
Payments to Acquire Projects |  |  |  | ¥ 3,600 |  |  |  |  | $ 580 | ¥ 3,600 |  |
Real Estate Investments, Net |  |  |  |  | 124 |  | 124 |  |  |  | 137 | ¥ 990
FuLi [Member] |  |  |  |  |  |  |  |  |  |  |  |
Operating Lease, Lease Income |  |  |  |  | 3 | 0 | 3 | 1 |  |  |  |
Monthly Lease Revenue Amount | $ 1 |  |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  | 7 | 7 | 13 | 14 |  |  |  |
Real Estate Investments, Net |  |  |  |  | 202 |  | 202 |  |  |  | $ 217 |
CHINA |  |  |  |  |  |  |  |  |  |  |  |
Operating Lease, Lease Income |  |  |  |  | 9 | 6 | 15 | 13 |  |  |  |
Depreciation |  |  |  |  | $ 16 | $ 17 | $ 32 | $ 34 |  |  |  |

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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