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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2015	Apr. 30, 2014
Operating activities
Net (loss) income	$ (4,655)us-gaap_NetIncomeLoss	$ 3,827us-gaap_NetIncomeLoss
Adjustments to reconcile net (loss) income to net cash flows used in operating activities
Depreciation and amortization	1,423us-gaap_DepreciationDepletionAndAmortization	1,433us-gaap_DepreciationDepletionAndAmortization
Loss (gain) on disposal of discontinued operations	0us-gaap_GainLossOnSaleOfBusiness	12us-gaap_GainLossOnSaleOfBusiness
Deferred tax expense	1us-gaap_DeferredIncomeTaxExpenseBenefit	612us-gaap_DeferredIncomeTaxExpenseBenefit
Stock-based compensation expense (benefit)	137us-gaap_ShareBasedCompensation	(352)us-gaap_ShareBasedCompensation
(Income) loss from joint venture	(165)us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable	8us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable
Cash surrender value on life insurance policies	(66)us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue	(58)us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue
Loss on disposal of fixed assets	0us-gaap_GainLossOnDispositionOfAssets	4us-gaap_GainLossOnDispositionOfAssets
Provision on uncollectible accounts	115us-gaap_ProvisionForDoubtfulAccounts	(64)us-gaap_ProvisionForDoubtfulAccounts
Changes in operating assets and liabilities
Accounts receivable	3,500us-gaap_IncreaseDecreaseInAccountsReceivable	(1,726)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories	(34)us-gaap_IncreaseDecreaseInInventories	(1,027)us-gaap_IncreaseDecreaseInInventories
Costs and estimated earnings in excess of billings on uncompleted contracts	(1,681)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings	(2,313)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings
Accounts payable	3,081us-gaap_IncreaseDecreaseInAccountsPayable	1,439us-gaap_IncreaseDecreaseInAccountsPayable
Accrued compensation and payroll taxes	5,782us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities	(4,598)us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities
Customers' deposits	(1,280)us-gaap_IncreaseDecreaseInCustomerDeposits	1,283us-gaap_IncreaseDecreaseInCustomerDeposits
Income taxes receivable and payable	(699)us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	947us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable
Prepaid expenses and other current assets	268us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	(1,023)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Other assets and liabilities	(6,569)us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet	280us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Net cash used in operating activities	(842)us-gaap_NetCashProvidedByUsedInOperatingActivities	(1,316)us-gaap_NetCashProvidedByUsedInOperatingActivities
Investing activities
Capital expenditures	(2,034)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment	(776)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from sales of property and equipment	0us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment	3us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Payment on loan from joint venture	331us-gaap_ProceedsFromRepaymentsOfDebt	0us-gaap_ProceedsFromRepaymentsOfDebt
Net cash used in investing activities	(1,703)us-gaap_NetCashProvidedByUsedInInvestingActivities	(773)us-gaap_NetCashProvidedByUsedInInvestingActivities
Financing activities
Proceeds from revolving lines	22,394us-gaap_ProceedsFromLinesOfCredit	20,359us-gaap_ProceedsFromLinesOfCredit
Proceeds from debt	597us-gaap_ProceedsFromBankDebt	48us-gaap_ProceedsFromBankDebt
Proceeds sourced from cash surrender value on life insurance policies	1,916us-gaap_ProceedsFromLifeInsurancePolicies	0us-gaap_ProceedsFromLifeInsurancePolicies
Payments of debt on revolving lines of credit	(22,482)us-gaap_RepaymentsOfLinesOfCredit	(18,733)us-gaap_RepaymentsOfLinesOfCredit
Payments of other debt	(539)us-gaap_RepaymentsOfDebt	(766)us-gaap_RepaymentsOfDebt
Increase (decrease) in drafts payable	933us-gaap_IncreaseDecreaseInOutstandingChecksFinancingActivities	435us-gaap_IncreaseDecreaseInOutstandingChecksFinancingActivities
Payments on capitalized lease obligations	(170)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations	(145)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations
Repurchase of common stock	(290)us-gaap_TreasuryStockValueAcquiredCostMethod	0us-gaap_TreasuryStockValueAcquiredCostMethod
Stock options exercised and restricted shares issued	0us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	161us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
Net cash provided by financing activities	2,359us-gaap_NetCashProvidedByUsedInFinancingActivities	1,359us-gaap_NetCashProvidedByUsedInFinancingActivities
Effect of exchange rate changes on cash and cash equivalents	396us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents	173us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net increase (decrease) in cash and cash equivalents	210us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease	(557)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents - beginning of period	10,508us-gaap_CashAndCashEquivalentsAtCarryingValue	13,395us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents - end of period	10,718us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations	12,838us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations
Supplemental cash flow information
Interest paid	272us-gaap_InterestPaid	369us-gaap_InterestPaid
Income taxes paid	715us-gaap_IncomeTaxesPaid	7us-gaap_IncomeTaxesPaid
Fixed assets acquired under capital lease	732us-gaap_PaymentsToAcquireEquipmentOnLease	0us-gaap_PaymentsToAcquireEquipmentOnLease
Funds held in escrow related to the sale of Thermal Care, Inc. assets	$ 0us-gaap_ProceedsFromSalesOfAssetsInvestingActivities	$ 1,125us-gaap_ProceedsFromSalesOfAssetsInvestingActivities

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