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Note 11 - Notes Payable (Details Textual) - USD ($) $ in Millions | Feb. 10, 2021 | May 04, 2020
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Paycheck Protection Program, CARES Act [Member] |  |
Proceeds from Bank Debt | $ 0.2 | $ 0.2

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- 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 https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromBankDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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