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Accounts Receivable, Net (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Accounts Receivable, Net (Textual) |  |  |
Provision for doubtful accounts | $ (68,359) | $ 444,480 | $ 142,781
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=121599337&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: | wfel_AccountsReceivableNetTextualAbstract
Namespace Prefix: | wfel_
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