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Note 14 - Segment Reporting (Details Textual) - Heavy Fabrications [Member]	6 Months Ended
	Jun. 30, 2021 MWh
Number of Facilities	2
Number of Tower Sections in Production Capacity of Turbines Total	1,650
Maximum [Member]
Annual Tower Production Capacity	550
Minimum [Member]
Power Generating Capacity of Turbines (Megawatt-Hour)	1,100

X

- Definition

Approximate number of wind towers that can be produced annually.

+ References

No definition available.

+ Details

Name:	bwen_AnnualTowerProductionCapacity
Namespace Prefix:	bwen_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of facilities of the entity.

+ References

No definition available.

+ Details

Name:	bwen_NumberOfFacilities
Namespace Prefix:	bwen_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the aggregate power-generating capacity of turbines in the Entity.

+ References

No definition available.

+ Details

Name:	bwen_NumberOfTowerSectionsInProductionCapacityOfTurbinesTotal
Namespace Prefix:	bwen_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the aggregate power-generating capacity of turbines for which the entity has the annual capacity to produce wind towers.

+ References

No definition available.

+ Details

Name:	bwen_PowerGeneratingCapacityOfTurbines
Namespace Prefix:	bwen_
Data Type:	dtr-types:energyItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=bwen_HeavyFabricationsMember
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:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: