v3.21.2

SBA and PPP Loans (Details Narrative) - USD ($) |  | 1 Months Ended | 2 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 27, 2020 | May 22, 2021 | Aug. 31, 2020 | May 22, 2020 | Apr. 05, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Proceeds from bank loans |  |  |  |  |  | $ 16,687 |
Payroll Protection Loans [Member] |  |  |  |  |  |  |
Debt payment terms | The remaining portion needs to be repaid over 2 years with a 6-month moratorium on payments and carry a 1% annual interest rate. |  |  |  |  |  |
Debt interest rate | 1.00% |  |  | 1.00% |  |  |
Proceeds from bank loans |  | $ 302,602 |  | $ 294,882 | $ 302,602 |  |
Economic Industry Disaster Loans [Member] |  |  |  |  |  |  |
Debt payment terms |  |  | Aggregate monthly payments of 13 months after receipt of funds. |  |  |  |
Debt interest rate |  |  | 3.75% |  |  |  |
Proceeds from bank loans |  |  | $ 325,300 |  |  |  |

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment. + 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 210.5-02.22(a)(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentPaymentTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from bank borrowing during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromBankDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=RETC_PayrollProtectionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=RETC_EconomicIndustryDisasterLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |