No definition available.

Name:	bmra_LEASESDetailsLineItems
Namespace Prefix:	bmra_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the operating lease was initiated, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	bmra_OperatingLeaseInitiationDate
Namespace Prefix:	bmra_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Rent percentage.

+ References

No definition available.

+ Details

Name:	bmra_RentPercentage
Namespace Prefix:	bmra_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Date which lease or group of leases is set to expire, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 25
-Paragraph 5
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-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123406913&loc=d3e41499-112717

+ Details

Name:	us-gaap_OperatingLeasesRentExpenseMinimumRentals
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cash payments to lessor's for use of assets under operating leases.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
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-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585

+ Details

Name:	us-gaap_PaymentsForRent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

+ 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
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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

- Details

Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=bmra_BuildingInIrvineCaliforniaMember
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Balance Type:
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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bmra_LeaseAmendmentAxis=bmra_FirstAmendmentToLeaseMember
Namespace Prefix:
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Balance Type:
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LEASES (Details) - USD ($)				3 Months Ended
LEASES (Details) - USD ($)	Sep. 01, 2021	Nov. 01, 2016	Jun. 18, 2009	Aug. 31, 2021	Aug. 31, 2020
LEASES (Details) [Line Items]
Payments for Rent				$ 78,166	$ 75,764
Building In Irvine California [Member]
LEASES (Details) [Line Items]
Operating Lease Initiation Date			Sep. 01, 2009
Lease Expiration Date			Aug. 31, 2016
Payments for Rent			$ 21,000
Security Deposit			$ 22,080
Building In Irvine California [Member] \| Subsequent Event [Member]
LEASES (Details) [Line Items]
Operating Leases, Rent Expense	$ 25,970
Rent Percentage	3.00%
Property Available for Operating Lease [Member]
LEASES (Details) [Line Items]
Operating Leases, Rent Expense				23,637
First Amendment To Lease [Member] \| Building In Irvine California [Member]
LEASES (Details) [Line Items]
Lease Expiration Date			Aug. 31, 2021
MEXICO
LEASES (Details) [Line Items]
Payments for Rent				$ 10,421	$ 10,870
MEXICO \| Property Available for Operating Lease [Member]
LEASES (Details) [Line Items]
Operating Leases, Rent Expense		$ 3,262
Operating Leases, Rent Expense, Minimum Rentals			$ 2,926