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Note 7 - Long-term investment (Details)	Dec. 31, 2024 USD ($)	Mar. 29, 2021 USD ($)	Mar. 29, 2021 CNY (¥)	Mar. 29, 2021 CNY (¥)
Haitianhuineng
Equity Method Investments		$ 0.2
Equity Method Investment, Ownership Percentage		4.56%		4.56%
Payments to Acquire Equity Method Investments		$ 0.2
Haitianhuineng | RMB
Equity Method Investments | ¥				¥ 1.5
Payments to Acquire Equity Method Investments | ¥			¥ 1.5
Qingdao Tungray Intelligent Technology Co., Ltd
Equity Method Investments	$ 200,000
Equity Method Investment, Ownership Percentage	100.00%
Other than Temporary Impairment Losses, Investments	$ 0

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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+ References

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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