Expected amount of decrease in annualized expenses as part of cost reduction program.

No definition available.

Name:	bdr_ExpectedDecreaseInAnnualExpenses
Namespace Prefix:	bdr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of temporary over advance on the credit facility during the period.

+ References

No definition available.

+ Details

Name:	bdr_LineOfCreditTemporaryOverAdvanceFacility
Namespace Prefix:	bdr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	bdr_LiquidityLineItems
Namespace Prefix:	bdr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

It represent advance rate of revolving credit.

+ References

No definition available.

+ Details

Name:	bdr_RevolvingCreditAdvancesRate
Namespace Prefix:	bdr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

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

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ 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_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

+ Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=bdr_SantanderBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
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:

Liquidity (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended	1 Months Ended
	Mar. 31, 2015	Apr. 24, 2015	Dec. 31, 2014	Aug. 06, 2008	Jun. 27, 2014	Apr. 30, 2015
Liquidity [Line Items]
Long-Term Line Of Credit	$ 1,695us-gaap_LineOfCredit		$ 1,269us-gaap_LineOfCredit
Line of Credit Facility, Remaining Borrowing Capacity	1,121
Line of Credit Facility, Expiration Date	Feb. 01, 2016
Expected Decrease in Annual Expenses	2,100bdr_ExpectedDecreaseInAnnualExpenses
Santander Bank [Member]
Liquidity [Line Items]
Long-Term Line Of Credit				8,000
Maximum [Member]
Liquidity [Line Items]
Revolving Credit Advances Rate					50.00%
Minimum [Member]
Liquidity [Line Items]
Revolving Credit Advances Rate					35.00%
Subsequent Event [Member]
Liquidity [Line Items]
Cash						254
Revolving Credit Facility [Member]
Liquidity [Line Items]
Long-Term Line Of Credit	1,695			5,000
Revolving Credit Facility [Member] \| Santander Bank [Member]
Liquidity [Line Items]
Line Of Credit Temporary Over Advance Facility	500
Revolving Credit Facility [Member] \| Maximum [Member]
Liquidity [Line Items]
Revolving Credit Advances Rate	50.00%
Revolving Credit Facility [Member] \| Maximum [Member] \| Eighth Amendment [Member]
Liquidity [Line Items]
Revolving Credit Advances Rate	35.00%
Revolving Credit Facility [Member] \| Minimum [Member]
Liquidity [Line Items]
Revolving Credit Advances Rate	25.00%
Revolving Credit Facility [Member] \| Minimum [Member] \| Eighth Amendment [Member]
Liquidity [Line Items]
Revolving Credit Advances Rate	25.00%
Revolving Credit Facility [Member] \| Subsequent Event [Member] \| Santander Bank [Member]
Liquidity [Line Items]
Long-Term Line Of Credit						3,037
Line of Credit Facility, Remaining Borrowing Capacity						340
Line Of Credit Temporary Over Advance Facility		$ 500