XML 73 R57.htm IDEA: XBRL DOCUMENT
v3.23.2

Benefit Plans and Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands, $ in Thousands |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 21, 2022 shares | Dec. 20, 2021 USD ($) shares | Sep. 16, 2021 shares | Sep. 17, 2020 shares | Oct. 07, 2019 shares | Jun. 20, 2019 shares | Nov. 01, 2005 USD ($) | Mar. 25, 2023 USD ($) $ / shares shares | Mar. 25, 2023 CAD ($) shares | Mar. 26, 2022 USD ($) $ / shares shares | Mar. 26, 2022 CAD ($) shares | Mar. 27, 2021 USD ($) $ / shares shares | Jan. 19, 2022 shares | Mar. 26, 2021 shares | Mar. 28, 2020 shares | Mar. 27, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding |  |  |  |  |  |  |  | 32,000 |  | 257,000 |  | 395,147 |  |  |  | 704,818
Shares reserved for issuance |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |
Warrants and rights outstanding expire date |  |  |  |  |  |  |  | Aug. 20, 2022 |  |  |  |  |  |  |  |
Additional compensation expense | $ |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |
Class of warrants or rights exercised during period shares |  |  |  |  |  |  |  | 90,056 | 90,056 | 48,823 | 48,823 |  |  |  |  |
Modification of certain awards from cash settled to equity settled | $ |  |  |  |  |  |  |  |  |  | $ 5,495 |  |  |  |  |  |
Class A Common Stock Voting Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right oustanding warrants exercisable during period, shares |  |  |  |  |  |  |  | 0 | 0 | 202,661 | 202,661 | 251,484 |  |  |  |
Proceeds from warrant exercises |  |  |  |  |  |  |  | $ 149,000 | $ 205,000 | $ 163,000 | $ 210,000 |  |  |  |  |
Common Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrants or rights exercised during period shares |  |  |  |  |  |  |  | 90,056 | 90,056 | 48,823 | 48,823 |  |  |  |  |
Common Stock Voting Shares [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares reserved for issuance |  |  |  |  |  |  |  |  |  |  |  | 1,796,088 |  |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation arrangement closing stock price | $ / shares |  |  |  |  |  |  |  | $ 8.18 |  | $ 5.12 |  | $ 3.62 |  |  |  |
Deferred Stock Units Dsu [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense | $ |  |  |  |  |  |  |  | $ 400 |  | $ 1,500 |  | $ 3,000 |  |  |  |
Share based compensation arrangement closing stock price | $ / shares |  |  |  |  |  |  |  | $ 8.18 |  |  |  | $ 8.18 |  |  |  |
Cash Settled Deferred Share Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Units granted |  |  |  |  |  |  |  | 35,584 | 35,584 | 61,470 | 61,470 | 223,878 |  |  |  |
Number of shares outstanding |  |  |  |  |  |  |  | 35,584 |  | 0 |  | 689,012 |  |  | 465,134 |
Share based compensation arrangement fair value of cash settled based on intrinsic value | $ |  |  |  |  |  |  |  | $ 400 |  | $ 0 |  | $ 3,100 |  |  |  |
Equity Settled Deferred Share Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares outstanding |  |  |  |  |  |  |  |  |  | 750,482 |  | 0 |  |  |  |
Cash Settled Restricted Stock Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense | $ |  |  |  |  |  |  |  | $ 300 |  | $ 800 |  | $ 300 |  |  |  |
Units granted |  |  |  |  |  |  |  | 0 | 0 |  |  | 375,000 |  |  |  |
Number of shares outstanding |  |  |  |  |  |  |  | 50,000 |  | 50,000 |  | 375,000 |  |  | 0 |
Share based compensation arrangement fair value of cash settled based on intrinsic value | $ |  |  |  |  |  |  |  | $ 500 |  | $ 200 |  | $ 300 |  |  |  |
Share based compensation arrangement weighted average remaining contractual life |  |  |  |  |  |  |  | 3 months 18 days | 3 months 18 days |  |  |  |  |  |  |
Modification of certain awards from cash settled to equity settled | $ |  | $ 900 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation arrangement by share based payment award equity instruments other than options conversion to equity settled awards |  | 325,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Settled Restricted Stock Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense | $ |  |  |  |  |  |  |  | $ 500 |  | $ 200 |  | $ 0 |  |  |  |
Number of shares outstanding |  |  |  |  |  |  |  |  |  | 325,000 |  | 0 |  | 325,000 |  |
Omnibus LTIP [Member] | Common Stock Voting Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding |  |  |  |  |  |  |  | 12,000 |  |  |  |  |  |  |  |
Exercise price | $ / shares |  |  |  |  |  |  |  | $ 1.43 |  |  |  |  |  |  |  |
Expiration period |  |  |  |  |  |  |  | 10 years | 10 years |  |  |  |  |  |  |
Total compensation cost for recognized expenses | $ |  |  |  |  |  |  |  | $ 0 |  | $ 0 |  | $ 0 |  |  |  |
Shares reserved for issuance |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  | 1,000,000 |  |
Omnibus LTIP [Member] | Stock Appreciation Rights (SARs) [Member] | Common Stock Voting Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation grants in period gross |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |
Omnibus LTIP [Member] | Deferred Stock Units Dsu [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation arrangement by share based payment award equity instruments other than options conversion to equity settled awards |  |  |  |  |  |  |  | 0 | 0 | 0 | 0 | 0 |  |  |  |
Omnibus LTIP [Member] | Cash Settled Deferred Share Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Units granted | 35,584 |  | 61,470 | 223,878 | 157,890 | 86,954 |  |  |  |  |  |  |  |  |  |
Number of shares outstanding |  |  |  |  |  |  |  | 35,584 |  | 0 |  | 689,012 |  |  |  |
Share based compensation arrangement by share based payment award equity instruments other than options vested in period |  | 750,482 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Modification of certain awards from cash settled to equity settled | $ |  | $ 4,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Omnibus LTIP [Member] | Equity Settled Deferred Share Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares outstanding |  |  |  |  |  |  |  | 750,482 |  | 750,482 |  | 0 |  |  |  |
Omnibus LTIP [Member] | Cash Settled Restricted Stock Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Units granted |  |  |  | 375,000 |  |  |  |  |  |  |  |  |  |  |  |
Long Term Incentive Plan [Member] | Common Stock Voting Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term incentive plan stock appreciation rights, weighted average exercise price | $ / shares |  |  |  |  |  |  |  | $ 1.14 |  |  |  |  |  |  |  |
Options outstanding |  |  |  |  |  |  |  | 20,000 |  |  |  |  |  |  |  |
Long Term Incentive Plan [Member] | Stock Appreciation Rights (SARs) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation recognized liability | $ |  |  |  |  |  |  |  | $ 400 |  | $ 300 |  |  |  |  |  |
Long Term Incentive Plan [Member] | Stock Appreciation Rights (SARs) [Member] | Common Stock Voting Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options exercisable |  |  |  |  |  |  |  | 35,000 |  |  |  |  |  |  |  |
Percentage of Outstanding Stock Options Fully Vested |  |  |  |  |  |  |  | 100.00% | 100.00% |  |  |  |  |  |  |
Share based compensation grants in period gross |  |  |  |  |  |  |  | 0 | 0 | 0 | 0 |  |  |  |  |

X
- Definition Adjustment of additional paid in capital modification of certain awards from cash settled to equity settled. + References No definition available. + Details
Name: | bgi_AdjustmentOfAdditionalPaidInCapitalModificationOfCertainAwardsFromCashSettledToEquitySettled
Namespace Prefix: | bgi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Class of warrant or right outstanding warrants exercisable during period ,shares. + References No definition available. + Details
Name: | bgi_ClassOfWarrantOrRightOutstandingWarrantsExercisableDuringPeriodShares
Namespace Prefix: | bgi_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class of warrants or rights exercised during period shares. + References No definition available. + Details
Name: | bgi_ClassOfWarrantsOrRightsExercisedDuringPeriodShares
Namespace Prefix: | bgi_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase decrease in allocated share based compensation expense. + References No definition available. + Details
Name: | bgi_IncreaseDecreaseInAllocatedShareBasedCompensationExpense
Namespace Prefix: | bgi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options, Conversion to Equity Settled Awards + References No definition available. + Details
Name: | bgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionToEquitySettledAwards
Namespace Prefix: | bgi_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share Based Compensation Arrangement By Share Based Payment Award Options Expirations Period + References No definition available. + Details
Name: | bgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsPeriod
Namespace Prefix: | bgi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share Based Compensation Arrangement By Share Based Payment Award Stock Appreciation Rights Exercisable Weighted Average Exercise Price + References No definition available. + Details
Name: | bgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockAppreciationRightsExercisableWeightedAverageExercisePrice
Namespace Prefix: | bgi_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition It represents percentage of outstanding stock option fully vested + References No definition available. + Details
Name: | bgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedPercentageOfOutstandingStockOption
Namespace Prefix: | bgi_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements. + References No definition available. + Details
Name: | us-gaap_DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash inflow associated with the amount received from holders exercising their stock warrants. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromWarrantExercises
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share or unit weighted-average intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares authorized for issuance under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cost expensed and capitalized for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Expiration date of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
Name: | us-gaap_WarrantsAndRightsOutstandingMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=bgi_ClassACommonStockVotingSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=bgi_CommonStockVotingSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=bgi_DeferredStockUnitsDsuMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=bgi_CashSettledDeferredShareUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=bgi_equitySettledDeferredShareUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=bgi_CashSettledRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=bgi_EquitySettledRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=bgi_OmnibusLongTermIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_StockAppreciationRightsSARSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=bgi_LongTermIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |