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Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) (Parenthetical) | Sep. 16, 2020 USD ($) | Sep. 16, 2020 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥)
--- | --- | --- | --- | ---
Penalty payable | $ |  |  | $ 900,000 |
Accrued loan | $ |  |  | $ 800,000 |
Repayment of loan default penalties | $ | $ 1,700,000 |  |  |
RMB [Member] |  |  |  |
Penalty payable | ¥ |  |  |  | ¥ 6,000,000
Accrued loan | ¥ |  |  |  | ¥ 5,800,000
Repayment of loan default penalties | ¥ |  | ¥ 11,800,000 |  |

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- Definition Accrued loan. + References No definition available. + Details
Name: | WETH_AccruedLoan
Namespace Prefix: | WETH_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Penalty payable. + References No definition available. + Details
Name: | WETH_PenaltyPayable
Namespace Prefix: | WETH_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Repayment of loan default penalties. + References No definition available. + Details
Name: | WETH_RepaymentOfLoanDefaultPenalties
Namespace Prefix: | WETH_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_AwardTypeAxis=WETH_RMBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |