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Noncontrolling Interests - Additional Information (Details) | Jun. 30, 2021 | Dec. 31, 2020
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Shangchi Automobile And Subsidiary Shenzhen Yimao [Member] |  |
Noncontrolling equity interest ownership percentage | 30.00% | 30.00%

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- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | srt_OwnershipAxis=tanh_ShangchiAutomobileAndSubsidiaryShenzhenYimaoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |