| Line Item | Dec 31, 2025 | Dec 31, 2024 | Dec 31, 2023 | Dec 31, 2022 | Dec 31, 2021 | Dec 31, 2020 | Dec 31, 2019 | Dec 31, 2018 | Dec 31, 2017 |
|---|---|---|---|---|---|---|---|---|---|
| CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS | |||||||||
| Revenue, net | |||||||||
| YoY growth | — | ||||||||
| Cost of revenues | — | ||||||||
| Gross Profit | |||||||||
| % of revenue | 100.0% | ||||||||
| Selling and marketing expenses | |||||||||
| General and administrative expenses | |||||||||
| Total Operating Expenses | |||||||||
| % of revenue | 24589.9% | ||||||||
| Loss from Operations | |||||||||
| % of revenue | -24489.9% | ||||||||
| Other income (expenses), net | |||||||||
| Foreign currency exchange gain (loss) | |||||||||
| Interest expense, net | |||||||||
| (Loss) gain on disposal of subsidiaries | |||||||||
| Change in fair value of warrants | |||||||||
| Share of equity loss | |||||||||
| Impairment of intangible assets | |||||||||
| Impairment of other receivables | — | ||||||||
| Impairment of prepaid expenses and other current assets | |||||||||
| Other expenses, net | |||||||||
| Loss Before Income Tax | |||||||||
| Income tax benefits | |||||||||
| Net Loss | |||||||||
| % of revenue | -41789.1% | ||||||||
| Less: net (loss) income attributable to non-controlling interests | |||||||||
| Net Loss Attributable to Kaixin's Shareholders | |||||||||
| % of revenue | -41788.4% | ||||||||
| Less: comprehensive loss attributable to non-controlling interest | — | ||||||||
| Comprehensive Loss Attributable to Kaixin's Shareholders | |||||||||
| Loss Per Share - Basic | |||||||||
| Loss Per Share - diluted |