Annual commitment fee of unused portion of the commitment.

No definition available.

Name:	bamm_AnnualCommitmentFeeOfUnusedPortionOfCommitment
Namespace Prefix:	bamm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	bamm_EquityMethodInvestmentAdditionalTextualAbstract
Namespace Prefix:	bamm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity method investment ownership percentage by other company.

+ References

No definition available.

+ Details

Name:	bamm_EquityMethodInvestmentOwnershipPercentageByOtherCompany
Namespace Prefix:	bamm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	bamm_EquityMethodInvestmentTextualAbstract
Namespace Prefix:	bamm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility initiation year.

+ References

No definition available.

+ Details

Name:	bamm_LineOfCreditFacilityInitiationYear
Namespace Prefix:	bamm_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility interest rate.

+ References

No definition available.

+ Details

Name:	bamm_LineOfCreditFacilityInterestRate
Namespace Prefix:	bamm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of credit facility maximum limit.

+ References

No definition available.

+ Details

Name:	bamm_LineOfCreditFacilityMaximumLimit
Namespace Prefix:	bamm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line of credit facility outstanding amount.

+ References

No definition available.

+ Details

Name:	bamm_LineOfCreditFacilityOutstandingAmount
Namespace Prefix:	bamm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of countries.

+ References

No definition available.

+ Details

Name:	bamm_NumberOfCountries
Namespace Prefix:	bamm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570

+ Details

Name:	us-gaap_EquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Equity Method Investments (Details Textual) (USD $)	3 Months Ended				3 Months Ended					3 Months Ended
Equity Method Investments (Details Textual) (USD $)	May 04, 2013	Feb. 02, 2013	Nov. 14, 2011	Mar. 31, 2010	May 04, 2013 Non Revolving Credit Facility [Member]	Nov. 14, 2011 Non Revolving Credit Facility [Member]	May 04, 2013 Kahn Family Holdings, LLC [Member]	May 04, 2013 Anderson Private Capital Partners I, L.P [Member]	May 04, 2013 Yogurt Mountain Holding, LLC [Member]	May 04, 2013 Anco Far East [Member]	May 04, 2013 If [Member] Countries	Apr. 30, 2013 If [Member]
Equity Method Investment (Textual) [Abstract]
Percentage of Equity method investment in company							20.00%	40.00%	40.00%		25.00%
Non-revolving line of credit					$ 1,500,000	$ 1,000,000
Line of credit agreement					2015-03
Line of Credit Remaining credit facility used to finance capital Expenditure	127,900,000								500,000
Acquired the equity interest in Yogurt Mountain	3,106,000	1,455,000		3,000,000								1,800,000
Number of countries											70
Ownership interest	30.00%									45.00%
Equity Method Investment (Additional Textual) [Abstract]
Interest on non-revolving line of credit	9.00%		11.00%
Annual commitment fee of unused portion of the commitment	0.25%
Outstanding borrowings	$ 1,000,000	$ 1,000,000