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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (5,015)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ (1,043)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Adjustments to reconcile net cash used in operating activities:    
Depreciation and amortization expense 2,578us-gaap_DepreciationDepletionAndAmortization 3,114us-gaap_DepreciationDepletionAndAmortization
Impairment charges 38us-gaap_AssetImpairmentCharges  
Stock-based compensation 255us-gaap_ShareBasedCompensation 223us-gaap_ShareBasedCompensation
Allowance for doubtful accounts   42bwen_AllowanceForDoubtfulAccountsChange
Common stock issued under defined contribution 401(k) plan   163us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans
(Gain) loss on disposal of assets   5us-gaap_GainLossOnDispositionOfAssets
Changes in operating assets and liabilities:    
Accounts receivable (1,829)us-gaap_IncreaseDecreaseInAccountsReceivable (4,947)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories (10,934)us-gaap_IncreaseDecreaseInInventories (1,980)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets 102us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets 457us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable 3,644us-gaap_IncreaseDecreaseInAccountsPayable (2,672)us-gaap_IncreaseDecreaseInAccountsPayable
Accrued liabilities (1,678)us-gaap_IncreaseDecreaseInAccruedLiabilities (788)us-gaap_IncreaseDecreaseInAccruedLiabilities
Customer deposits (6,727)us-gaap_IncreaseDecreaseInCustomerDeposits (4,266)us-gaap_IncreaseDecreaseInCustomerDeposits
Other non-current assets and liabilities (472)us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet (425)us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Net cash used in operating activities (20,038)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (12,117)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of available for sale securities (1,884)us-gaap_PaymentsToAcquireAvailableForSaleSecurities (2,543)us-gaap_PaymentsToAcquireAvailableForSaleSecurities
Sales of available for sale securities 5,083us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities 1,890us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Maturities of available for sale securities 4,825us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities  
Purchases of property and equipment (840)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (2,200)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from disposals of property and equipment   45us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Net cash provided by (used in) by investing activities 7,184us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (2,808)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITIES:    
Payments on lines of credit and notes payable (17,304)us-gaap_RepaymentsOfShortTermDebt (164)us-gaap_RepaymentsOfShortTermDebt
Proceeds from lines of credit and notes payable 18,400us-gaap_ProceedsFromShortTermDebt  
Principal payments on capital leases (241)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations (246)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations
Net cash provided by (used in) financing activities 855us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations (410)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS (11,999)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (15,335)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AND CASH EQUIVALENTS, beginning of the period 12,149us-gaap_CashAndCashEquivalentsAtCarryingValue 24,936us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AND CASH EQUIVALENTS, end of the period 150us-gaap_CashAndCashEquivalentsAtCarryingValue 9,601us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental cash flow information:    
Interest paid 102us-gaap_InterestPaidNet 143us-gaap_InterestPaidNet
Income taxes paid 1us-gaap_IncomeTaxesPaidNet 2us-gaap_IncomeTaxesPaidNet
Non-cash investing and financing activities:    
Issuance of restricted stock grants $ 225us-gaap_StockIssued1 $ 138us-gaap_StockIssued1