No definition available.

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

- Definition

Represents the number of years in which the lease expires.

+ References

No definition available.

+ Details

Name:	bmra_LeaseExpirationPeriod
Namespace Prefix:	bmra_
Data Type:	xbrli:durationItemType
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

The aggregate amount of shares to be sold on agreement.

+ References

No definition available.

+ Details

Name:	bmra_SaleOfStockAggregateAmount
Namespace Prefix:	bmra_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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 CCYY-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/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 25
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77910348&loc=d3e34039-112682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
-URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697

+ Details

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

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

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

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=bmra_AtMarketIssuanceSalesAgreementMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=bmra_BuildingInIrvineCaliforniaMember
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- Details

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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bmra_LeaseAmendmentAxis=bmra_FirstAmendmentToLeaseMember
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Commitments and Contingencies (Details) - USD ($)			1 Months Ended			3 Months Ended
Commitments and Contingencies (Details) - USD ($)	Sep. 01, 2018	Jun. 18, 2009	Oct. 15, 2018	Dec. 31, 2017	Nov. 30, 2016	Aug. 31, 2018
At Market Issuance Sales Agreement [Member]
Commitments and Contingencies (Details) [Line Items]
Sale of Stock, Aggregate Amount				$ 7,000,000
Sale of Stock, Price Per Share (in Dollars per share)				$ 0.08
Building In Irvine California [Member]
Commitments and Contingencies (Details) [Line Items]
Operating Lease Initiation Date		Sep. 01, 2009
Lease Expiration Date		Aug. 31, 2016
Operating Leases, Rent Expense, Minimum Rentals		$ 18,490
Operating Leases, Rent Expense		$ 22,080
Property Available for Operating Lease [Member]
Commitments and Contingencies (Details) [Line Items]
Operating Leases, Rent Expense, Minimum Rentals					$ 2,926
Lease Expiration Period					10 years
Subsequent Event [Member]
Commitments and Contingencies (Details) [Line Items]
Sale of Stock, Number of Shares Issued in Transaction (in Shares)			52,936
Common Stock [Member]
Commitments and Contingencies (Details) [Line Items]
Sale of Stock, Number of Shares Issued in Transaction (in Shares)						44,321
Sale of Stock, Consideration Received on Transaction						$ 170,443
First Amendment To Lease [Member] \| Building In Irvine California [Member]
Commitments and Contingencies (Details) [Line Items]
Operating Lease Initiation Date						Sep. 01, 2016
Lease Expiration Date						Aug. 31, 2021
Operating Leases, Rent Expense, Minimum Rentals						$ 21,000
First Amendment To Lease [Member] \| Subsequent Event [Member] \| Building In Irvine California [Member]
Commitments and Contingencies (Details) [Line Items]
Operating Leases, Rent Expense	$ 22,279