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Note 2 - Noncontrolling interest (Details Textual)	1 Months Ended		3 Months Ended
	Feb. 28, 2025 USD ($)	Feb. 28, 2025 CNY (¥)	Mar. 31, 2025 CNY (¥)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Equity, Attributable to Noncontrolling Interest				$ 6,838	$ 0
Nantong Green Energy Technology [Member]
Joint Venture, Research and Development Funding from Joint Venture Partner	$ 1,100,000	¥ 8,000,000
Joint Venture, Maximum Contingent Amount of Funding Loan | ¥			¥ 10,000,000
Joint Venture, Research and Development Funding Loan, Annual Interest Rate				12.00%
Equity, Attributable to Noncontrolling Interest				$ 6,838
Nantong Green Energy Technology [Member]
Subsidiary, Ownership Percentage, Parent				90.00%
Nantong Green Energy Technology [Member] | Unrelated Third Party [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner				10.00%

X

- Definition

Represents the maximum amount of a funding loan from a joint venture partner that is contingent on certain milestones being met.

+ References

No definition available.

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- Definition

Represents the amount of research and development funding provided from a joint venture partner in a joint venture.

+ References

No definition available.

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- Definition

Represents the annual interest rate used in a joint venture loan for research and development funding.

+ References

No definition available.

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- Definition

Amount of equity (deficit) attributable to noncontrolling interest. Excludes temporary equity.

+ References

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+ References

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