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BASIS OF PRESENTATION (Details) (USD $)
3 Months Ended 12 Months Ended 45 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Mar. 31, 2015
Aug. 23, 2012
Description of Business                
Revenue as a percentage of sales associated with new wind turbine installations 77.00%bwen_RevenueAsPercentageOfSalesAssociatedWithNewWindTurbineInstallations              
Liquidity                
Cash and cash equivalents and short-term investments $ 150,000us-gaap_CashCashEquivalentsAndShortTermInvestments   $ 20,173,000us-gaap_CashCashEquivalentsAndShortTermInvestments       $ 150,000us-gaap_CashCashEquivalentsAndShortTermInvestments  
Increase (decrease) in Cash and cash equivalents and Short-term investments 20,023,000bwen_CashCashEquivalentsShortTermInvestmentsIncreaseDecrease              
Long-term Line of Credit 1,238,000us-gaap_LineOfCredit           1,238,000us-gaap_LineOfCredit  
Raw materials 27,670,000us-gaap_InventoryRawMaterials   21,385,000us-gaap_InventoryRawMaterials       27,670,000us-gaap_InventoryRawMaterials  
Revenues 51,051,000us-gaap_SalesRevenueNet 58,800,000us-gaap_SalesRevenueNet            
Total debt and capital lease obligations 4,866,000us-gaap_DebtAndCapitalLeaseObligations           4,866,000us-gaap_DebtAndCapitalLeaseObligations  
Obligation to make principal payments on outstanding debt during the next twelve months 1,302,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths           1,302,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths  
RESTRUCTURING                
Restructuring Charges     2,153,000us-gaap_RestructuringCharges 5,550,000us-gaap_RestructuringCharges 5,092,000us-gaap_RestructuringCharges 874,000us-gaap_RestructuringCharges 13,669,000us-gaap_RestructuringCharges  
Tower and Weldments                
Liquidity                
Raw materials 5,973,000us-gaap_InventoryRawMaterials
/ us-gaap_StatementBusinessSegmentsAxis
= bwen_TowersMember
          5,973,000us-gaap_InventoryRawMaterials
/ us-gaap_StatementBusinessSegmentsAxis
= bwen_TowersMember
 
Number of towers produced 18bwen_NumberOfTowersProduced
/ us-gaap_StatementBusinessSegmentsAxis
= bwen_TowersMember
             
Forecast                
Liquidity                
Revenues 5,000,000us-gaap_SalesRevenueNet
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
             
Credit facility                
Description of Business                
Maximum borrowing capacity               20,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
Maximum borrowing capacity of the face value of eligible A/R (as a percent)               85.00%bwen_LineOfCreditFacilityBorrowingRestrictionPercentageOfReceivables
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
Maximum percentage of book value of inventories that may be financed               50.00%bwen_LineOfCreditFacilityBorrowingRestrictionPercentageOfInventories
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
Liquidity                
Long-term Line of Credit 1,238,000us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
          1,238,000us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
 
Current borrowing capacity $ 15,733,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
          $ 15,733,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember