| 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 INCOME (LOSS) | |||||||||
| Revenues | |||||||||
| YoY growth | -10.7% | ||||||||
| Cost of Revenue | |||||||||
| Gross profit | |||||||||
| % of revenue | 18.6% | ||||||||
| Operating expenses | |||||||||
| Selling, General and Administrative Expense | |||||||||
| Research and Development Expense | |||||||||
| Total operating expenses | |||||||||
| % of revenue | 50.4% | ||||||||
| (Loss) income from operations | |||||||||
| % of revenue | -31.8% | ||||||||
| Other income (expenses) | |||||||||
| Change in fair value of convertible note | |||||||||
| Non-Operating Income (Expense) | |||||||||
| Changes in fair value of digital assets | |||||||||
| Interest Income | |||||||||
| Interest expense | |||||||||
| Financing interest income, net | |||||||||
| Long- term investments impairment | |||||||||
| Gain from disposal of financing receivables | |||||||||
| Loss on refund receivable | |||||||||
| Total other (expenses) income, net | |||||||||
| (Loss) income before income tax | |||||||||
| Income Tax Expense | |||||||||
| Net (loss) income from continuing operations | |||||||||
| Income from Discontinued Operations | |||||||||
| Net (loss) income | |||||||||
| % of revenue | -80.9% | ||||||||
| Net Income Attributable to Noncontrolling Interest | |||||||||
| Net (loss) income attributable to the Company | |||||||||
| % of revenue | -80.9% | ||||||||
| Net (loss) income attributable to common stockholders of Tantech Holdings Ltd | |||||||||
| Net Income Attributable to Noncontrolling Interest | |||||||||
| Comprehensive (loss) income attributable to common stockholders of Tantech Holdings Ltd | |||||||||
| Earnings Per Share (Diluted) |