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Accounts Receivable, Net (Details) - USD ($) | 12 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Credit Loss, Additional Improvements [Abstract] |  |  |
Provision for doubtful accounts | $ 182,602 |  | $ 353,657
Recovery for doubtful accounts |  | $ 68,359 |

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- Definition Amount of increase in allowance for credit loss on accounts receivable, from recovery. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CreditLossAdditionalImprovementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | wfel_ProvisionForDoubtfulAccount
Namespace Prefix: | wfel_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration