Warrant liabilities (Details) - Warrant [Member] |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
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Jun. 30, 2026
$ / shares
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Jun. 30, 2026
CNY (¥)
shares
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Dec. 31, 2025
$ / shares
shares
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| Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] | |||
| Beginning balance | shares | 270,500 | ||
| Weighted average exercise price, beginning balance | $ 92,000 | ||
| Average remaining period | 1 year 2 months 15 days | 1 year 8 months 15 days | |
| Issued | shares | |||
| Weighted average exercise price, Issued | |||
| Forfeited | ¥ | |||
| Weighted average exercise price, Forfeited | |||
| Exercised | shares | |||
| Weighted average exercise price, Exercised | |||
| Expired | shares | |||
| Weighted average exercise price, Expired | |||
| Ending balance | shares | 270,500 | 270,500 | |
| Weighted average exercise price, ending balance | $ 92,000 | $ 92,000 | |
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- References No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Weighted average price of options that were either forfeited or expired. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Value of forfeited shares granted under share-based payment arrangement. Excludes employee stock ownership plan (ESOP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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