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Short-term bank loans - Additional Information (Details) |  |  |  |  |  |  | 12 Months Ended |  |  |  |  |
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Jul. 04, 2021 | Jul. 02, 2021 USD ($) | Apr. 07, 2021 USD ($) item | Jul. 09, 2020 USD ($) | Jul. 09, 2020 USD ($) | Jul. 09, 2020 USD ($) item | Apr. 27, 2020 USD ($) item | Jan. 06, 2020 USD ($) item | Dec. 31, 2021 USD ($) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 USD ($) | Jul. 02, 2021 CNY (¥) | Apr. 07, 2021 CNY (¥) | Jul. 09, 2020 CNY (¥) | Apr. 27, 2020 CNY (¥) | Jan. 06, 2020 CNY (¥)
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Bank Loans and Notes Payable | $ |  |  |  |  |  |  |  |  | $ 4,719,552 |  | $ 5,564,790 |  |  |  |  |  |  |
Interest Expense | $ |  |  |  |  |  |  |  |  | $ 740,400 |  | 300,125 |  | $ 443,262 |  |  |  |  |
Loan payable to Bank of China Lishui Branch [Member] | Tantech Bamboo [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  | $ 2,725,674 |  |  |  |  |  |  |  |  |  | ¥ 17,780,000
Debt Instrument, Term |  |  |  |  |  |  |  | 6 months |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 5.88% |  |  |  |  |  |  |  |  |  | 5.88%
Debt Instrument, Collateral Amount |  |  |  |  |  |  |  | $ 4,000,000.0 |  |  |  |  |  |  |  |  |  | ¥ 25,960,000
Number of related paties |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |
Loan payable to Bank of China Lishui Branch [Member] | Tantech Charcoal [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 2,679,852,000 |  | $ 2,958,690 | $ 2,958,690 | $ 2,958,690 |  | $ 1,533,000 |  |  |  |  |  | ¥ 17,080,000 |  | ¥ 19,300,000 |  | ¥ 10,000,000
Debt Instrument, Term |  | 6 months |  | 1 year |  |  |  | 6 months |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.65% |  | 4.85% | 4.85% | 4.85% |  | 4.00% | 4.50% |  |  |  |  | 4.65% |  | 4.85% |  | 4.00%
Debt Instrument, Collateral Amount |  |  |  |  |  |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |  | ¥ 10,000,000
Number of related paties |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Number of third party |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |
Number of individual related party |  |  |  |  | 3 | 3 |  | 2 |  |  |  |  |  |  |  |  |  |
Number of properties collateralized for loan |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Loan payable to Bank of China Lishui Branch [Member] | Building And Land Use Right [Member] | Tantech Charcoal [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Collateral Amount |  | $ 4,100,000 |  | $ 4,000,000.0 | $ 4,000,000.0 | $ 4,000,000.0 |  |  |  |  |  |  |  |  |  | ¥ 25,960,000 |  |
Loan payable to Shanghai Pudong Development ("SPD") Bank Lishui Branch [Member] | Tantech Bamboo [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 2,510,400 |  |  |  | $ 2,912,700 |  |  |  |  |  |  |  | ¥ 16,000,000 |  | ¥ 19,000,000 |
Debt Instrument, Term | 1 year |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 5.65% |  |  |  | 4.785% |  | 3.90% |  |  |  |  |  | 5.65% |  | 4.785% |
Debt Instrument, Collateral Amount |  |  |  |  |  |  | $ 4,500,000 |  |  |  |  |  |  |  |  |  | ¥ 29,250,000 |
Number of related paties |  |  | 3 |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |
Amount of loan repaid |  |  |  |  |  |  |  |  | $ 470,700 | ¥ 3,000,000.0 | 306,600 | ¥ 2,000,000 |  |  |  |  |  |
Loan payable to Shanghai Pudong Development ("SPD") Bank Lishui Branch [Member] | Building And Land Use Right [Member] | Tantech Bamboo [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Collateral Amount |  |  | $ 4,600,000 |  |  |  |  |  |  |  |  |  |  |  | ¥ 29,250,000 |  |  |
Notes Payable to Banks [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense | $ |  |  |  |  |  |  |  |  | 265,248 |  | $ 300,125 |  | $ 421,646 |  |  |  |  |
Notes Payable to Banks [Member] | Loan payable to Bank of China Lishui Branch [Member] | Tantech Bamboo [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of loan repaid |  |  |  |  |  |  |  |  | $ 156,900 | ¥ 1,000,000 |  |  |  |  |  |  |  |

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