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Note 20 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
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Nov. 30, 2021 | Nov. 30, 2020
CO2 Pistols [Member] |  |
Initial Royalty, Percentage of Net Price | 2.50% |
Net Price Per Unit | 167.60 |
Reduction in Royalty, Percentage Per Year | 0.10% |
Minimum Royalty Percentage | 1.00% |
Initial Royalty Percentage for New Products in Category | 2.50% |
Fintail Projectiles [Member] |  |
Initial Royalty, Percentage of Net Price | 4.00% |
Andre Buys [Member] |  |
Other Commitment, to be Paid, Year One | $ 25 |
Royalty Expense | $ 400 | $ 200

X
- Definition Initial royalty percentage of agreed upon net price for other new products in the same category. + References No definition available. + Details
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Namespace Prefix: | byrn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Royalty percentage of agreed upon net price for the first year of agreement. + References No definition available. + Details
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Namespace Prefix: | byrn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum royalty percentage per agreement. + References No definition available. + Details
Name: | byrn_MinimumRoyaltyPercentage
Namespace Prefix: | byrn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stipulated net price per unit per royalty agreement. + References No definition available. + Details
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Namespace Prefix: | byrn_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reduction in royalty percentage each year after first year of royalty agreement. + References No definition available. + Details
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Namespace Prefix: | byrn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of commitment classified as other to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |