XML 92 R79.htm IDEA: XBRL DOCUMENT v3.22.4

Long term investments (Details) ¥ in Thousands, $ in Thousands			1 Months Ended	12 Months Ended
	Nov. 29, 2019 USD ($)	Jan. 10, 2018 USD ($) km²	Mar. 31, 2021 km²	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Apr. 03, 2020 USD ($)	Apr. 03, 2020 CNY (¥)	Apr. 02, 2020	Nov. 29, 2019 CNY (¥)	Jan. 10, 2018 CNY (¥)
Other than Temporary Impairment Losses, Investments | $				$ 0	$ 0	$ 0
Libo Haokun [Member]
Amount of investment		$ 18,800									¥ 120,000
Equity Method Investment, Ownership Percentage		18.00%									18.00%
Number of square kilometers, right to mine provided		0.11
Jingning Zhonggang [Member]
Equity Method Investment, Ownership Percentage						82.00%
Tantech [Member]
Equity Method Investment, Ownership Percentage						18.00%
Fuquan Chengwang [Member]
Amount of investment	$ 7,300						$ 7,300	¥ 46,500		¥ 46,320
Equity Method Investment, Ownership Percentage	18.00%					100.00%	14.76%	14.76%	18.00%	18.00%
Value of the mining rights | ¥										¥ 257,350
Number of days, consideration payable after the completion of transfer of ownership	30 days
Number of square kilometers, right to mine provided			0.2607
Fuquan Chengwang [Member] | Tantech [Member]
Equity Method Investment, Ownership Percentage					18.00%	18.00%
Jingning Meizhongkuang [Member]
Equity Method Investment, Ownership Percentage					18.00%	18.00%	18.00%	18.00%

X

- Definition

Represents the number of days in which consideration payable after the completion of transfer of ownership.

+ References

No definition available.

+ Details

Name:	tanh_NumberOfDaysConsiderationPayableAfterCompletionOfTransferOfOwnership
Namespace Prefix:	tanh_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the information pertaining to the number of square kilometers, right to mine provided.

+ References

No definition available.

+ Details

Name:	tanh_NumberOfSquareKilometersRightToMineProvided
Namespace Prefix:	tanh_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the value of mining rights.

+ References

No definition available.

+ Details

Name:	tanh_ValueOfMiningRights
Namespace Prefix:	tanh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_EquityMethodInvestmentAggregateCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 8A
-URI http://asc.fasb.org/extlink&oid=124260329&loc=SL6284422-111562

+ Details

Name:	us-gaap_ImpairmentOfInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=tanh_LiboHaokunMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=tanh_JingningZhonggangMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=tanh_TantechMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=tanh_FuquanChengwangMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tanh_TantechMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=tanh_JingningMeizhongkuangMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: