Condensed financial information of the parent company - Condensed Statements of Comprehensive Loss (Details) ¥ in Thousands, $ in Thousands |
12 Months Ended | ||||
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Dec. 31, 2025
CNY (¥)
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Dec. 31, 2025
USD ($)
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Dec. 31, 2024
CNY (¥)
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Dec. 31, 2024
USD ($)
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Dec. 31, 2023
CNY (¥)
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| Condensed Statements of Comprehensive (Loss)/Income | |||||
| Revenues | ¥ 374,847 | $ 53,602 | ¥ 316,170 | ¥ 290,232 | |
| Cost of revenues | (122,937) | (17,580) | (107,136) | (90,946) | |
| Gross profit | 251,910 | 36,022 | 209,034 | 199,286 | |
| Operating expenses | |||||
| Research and development | (104,723) | (14,975) | (94,816) | (121,806) | |
| Sales and marketing | (101,003) | (14,443) | (84,900) | (82,705) | |
| General and administrative | (48,168) | (6,888) | (45,448) | (45,653) | |
| Share of (loss)/income of the subsidiaries and VIE | (450) | ||||
| Total operating expenses | (253,894) | (36,306) | (225,164) | (250,164) | |
| (Loss)/income from operations | 706 | 101 | (9,901) | (40,517) | |
| Foreign exchange (loss)/gain, net | (24) | (3) | 122 | (18) | |
| Interest income | 1,298 | 186 | 2,881 | 1,200 | |
| (Loss)/income before income taxes | 2,647 | 379 | (6,659) | (64,554) | |
| Income tax expenses | (73) | (10) | (110) | 1,886 | |
| Net (loss)/income | 423 | 61 | (7,046) | (62,098) | |
| Other comprehensive income/(loss) | |||||
| Foreign currency translation adjustments | (1,600) | (229) | 817 | $ 817 | 919 |
| Comprehensive loss | (1,177) | (168) | (6,229) | (61,179) | |
| Parent Company | |||||
| Operating expenses | |||||
| Sales and marketing | (764) | (109) | (416) | (517) | |
| General and administrative | (5,499) | (786) | (7,018) | (11,430) | |
| Share of (loss)/income of the subsidiaries and VIE | 6,340 | 907 | 373 | (45,933) | |
| Total operating expenses | 77 | 12 | (7,061) | (57,880) | |
| (Loss)/income from operations | 77 | 12 | (7,061) | (57,880) | |
| Foreign exchange (loss)/gain, net | 2 | (6) | (61) | ||
| Interest income | 344 | 49 | 21 | 34 | |
| Other loss | (4,191) | ||||
| (Loss)/income before income taxes | 423 | 61 | (7,046) | (62,098) | |
| Net (loss)/income | 423 | 61 | (7,046) | (62,098) | |
| Net (loss)/income attributable to common shareholders | 423 | 61 | (7,046) | (62,098) | |
| Other comprehensive income/(loss) | |||||
| Foreign currency translation adjustments | (1,600) | (229) | 817 | 919 | |
| Total other comprehensive income/(loss), net of tax | (1,600) | (229) | 817 | 919 | |
| Comprehensive loss | ¥ (1,177) | $ (168) | ¥ (6,229) | ¥ (61,179) | |
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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 Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate cost of goods produced and sold and services rendered during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before tax, of realized and unrealized gain (loss) from foreign currency transaction. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after tax of other comprehensive income (loss) attributable to parent entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of income related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The aggregate total amount of expenses directly related to the marketing or selling of products or services. No definition available.
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- Details
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