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Document and Entity Information
 12 Months Ended
Dec. 31, 2021
shares
Entity Addresses [Line Items]  
Document Type 20-F/A
Document Registration Statement false
Document Annual Report true
Document Period End Date Dec. 31, 2021
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-36885
Entity Registrant Name TANTECH HOLDINGS LTD
Entity Incorporation, State or Country Code D8
Entity Address, Address Line One No. 10 Cen Shan Road, Shuige Industrial Zone
Entity Address, City or Town Lishui City
Entity Address, Country CN
Entity Address, Postal Zip Code 323000
Title of 12(b) Security Common shares
Trading Symbol TANH
Security Exchange Name NASDAQ
Entity Common Stock, Shares Outstanding 6,399,460
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Emerging Growth Company false
Entity Shell Company false
Document Accounting Standard U.S. GAAP
Entity Central Index Key 0001588084
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2021
Document Fiscal Period Focus FY
Amendment Flag true
Amendment Description This Amendment No. 2 on Form 20-F/A (the “Amendment”) amends the annual report on Form 20-F of Tantech Holdings Ltd (the “Company”) for the fiscal year ended December 31, 2021, originally filed with the U.S. Securities and Exchange Commission (“SEC”) on July 18, 2022 (the “Original Form 20-F”), as amended by Amendment No. 1 on Form 20-F/A, as filed with the SEC on December 23, 2022 (“Amendment No. 1” and the Original Form 20-F as amended by Amendment No. 1, the “Form 20-F”). This Amendment is being filed to amend Item 17 of Part III in the Form 20-F to include the full set of financial statements and a revised Report of Independent Registered Public Accounting Firm relating thereto. Item 19 of the Form 20-F is amended by the filing of new exhibits regarding CEO and CFO certifications and the auditor’s consent letter in this Amendment.
Auditor Name YCM CPA, Inc.
Auditor Firm ID 6781
Auditor Location Irvine, California
Business Contact [Member]  
Entity Addresses [Line Items]  
Contact Personnel Name Mr. Weilin Zhang
Entity Address, Address Line One No. 10 Cen Shan Road, Shuige Industrial Zone
Entity Address, City or Town Lishui City
Entity Address, Country CN
Entity Address, Postal Zip Code 323000
City Area Code 86
Local Phone Number 578-226-2305
Contact Personnel Fax Number 86-578-226-2360
Contact Personnel Email Address tantech@tantech.cn