v3.21.2

Notes Payable (Details Narrative) | Dec. 31, 2020 USD ($)
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Private Investor [Member] |
Note payable current | $ 35,000

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- Definition Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer. + 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 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_NotesPayableCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | srt_TitleOfIndividualAxis=RETC_PrivateInvestorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |