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CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)
Apr. 30, 2015
Jan. 31, 2015
Current assets    
Cash and cash equivalents $ 10,718,000us-gaap_CashAndCashEquivalentsAtCarryingValue $ 10,508,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Restricted cash 423,000us-gaap_RestrictedCashAndInvestmentsCurrent 428,000us-gaap_RestrictedCashAndInvestmentsCurrent
Trade accounts receivable, less allowance for doubtful accounts of $225 at April 30, 2015 and $110 at January 31, 2015 38,190,000us-gaap_AccountsReceivableNetCurrent 41,847,000us-gaap_AccountsReceivableNetCurrent
Inventories, net 29,765,000us-gaap_InventoryNet 29,770,000us-gaap_InventoryNet
Prepaid expenses and other current assets 3,854,000us-gaap_PrepaidExpenseAndOtherAssetsCurrent 4,349,000us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Costs and estimated earnings in excess of billings on uncompleted contracts 2,442,000us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear 700,000us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear
Total current assets 85,392,000us-gaap_AssetsCurrent 87,602,000us-gaap_AssetsCurrent
Property, plant and equipment, net of accumulated depreciation 42,131,000us-gaap_PropertyPlantAndEquipmentNet 41,486,000us-gaap_PropertyPlantAndEquipmentNet
Other assets    
Note receivable from joint venture 3,814,000us-gaap_NotesAndLoansReceivableNetNoncurrent 3,931,000us-gaap_NotesAndLoansReceivableNetNoncurrent
Investment in joint venture 8,680,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures 8,514,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Cash surrender value on life insurance policies 1,406,000us-gaap_CashSurrenderValueOfLifeInsurance 3,256,000us-gaap_CashSurrenderValueOfLifeInsurance
Other assets 3,175,000us-gaap_OtherAssetsNoncurrent 3,215,000us-gaap_OtherAssetsNoncurrent
Assets held for sale long-term 503,000us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssets 534,000us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssets
Total other assets 17,578,000us-gaap_AssetsNoncurrent 19,450,000us-gaap_AssetsNoncurrent
Total assets 145,101,000us-gaap_Assets 148,538,000us-gaap_Assets
Current liabilities    
Trade accounts payable 15,072,000us-gaap_AccountsPayableCurrent 11,072,000us-gaap_AccountsPayableCurrent
Accrued compensation and payroll taxes 11,933,000us-gaap_EmployeeRelatedLiabilitiesCurrent 5,551,000us-gaap_EmployeeRelatedLiabilitiesCurrent
Commissions and management incentives payable 5,131,000us-gaap_AccruedSalesCommissionCurrent 5,734,000us-gaap_AccruedSalesCommissionCurrent
Revolving line domestic 11,954,000us-gaap_LinesOfCreditCurrent 11,353,000us-gaap_LinesOfCreditCurrent
Current maturities of long-term debt 5,035,000us-gaap_LongTermDebtCurrent 5,679,000us-gaap_LongTermDebtCurrent
Customers' deposits 6,064,000us-gaap_CustomerDepositsCurrent 7,341,000us-gaap_CustomerDepositsCurrent
Billings in excess of costs and estimated earnings on uncompleted contracts 742,000us-gaap_BillingsInExcessOfCostCurrent 681,000us-gaap_BillingsInExcessOfCostCurrent
Other accrued liabilities 2,270,000us-gaap_AccruedLiabilitiesCurrent 2,486,000us-gaap_AccruedLiabilitiesCurrent
Deferred tax liabilities - current 166,000us-gaap_DeferredTaxLiabilitiesCurrent 165,000us-gaap_DeferredTaxLiabilitiesCurrent
Income taxes payable 977,000us-gaap_AccruedIncomeTaxesCurrent 1,688,000us-gaap_AccruedIncomeTaxesCurrent
Total current liabilities 59,344,000us-gaap_LiabilitiesCurrent 51,750,000us-gaap_LiabilitiesCurrent
Long-term liabilities    
Long-term debt, less current maturities 12,424,000us-gaap_LongTermDebtNoncurrent 12,603,000us-gaap_LongTermDebtNoncurrent
Deferred compensation liabilities 198,000us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent 6,560,000us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent
Deferred tax liabilities - long-term 294,000us-gaap_DeferredTaxLiabilitiesNoncurrent 309,000us-gaap_DeferredTaxLiabilitiesNoncurrent
Other long-term liabilities 3,777,000us-gaap_OtherLiabilitiesNoncurrent 3,793,000us-gaap_OtherLiabilitiesNoncurrent
Total long-term liabilities 16,693,000us-gaap_LiabilitiesNoncurrent 23,265,000us-gaap_LiabilitiesNoncurrent
Stockholders' equity    
Common stock, $.01 par value, authorized 50,000 shares; 7,246 issued and outstanding at April 30, 2015 and 7,291 issued and outstanding at January 31, 2015 73,000us-gaap_CommonStockValue 73,000us-gaap_CommonStockValue
Additional paid-in capital 52,792,000us-gaap_AdditionalPaidInCapital 52,655,000us-gaap_AdditionalPaidInCapital
Treasury Stock 45 shares at April 30, 2015 and none at January 31,2015 (290,000)us-gaap_TreasuryStockValue 0us-gaap_TreasuryStockValue
Retained earnings 20,671,000us-gaap_RetainedEarningsUnappropriated 25,324,000us-gaap_RetainedEarningsUnappropriated
Accumulated other comprehensive loss (4,182,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (4,529,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Total stockholders' equity 69,064,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 73,523,000us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Total liabilities and stockholders' equity $ 145,101,000us-gaap_LiabilitiesAndStockholdersEquity $ 148,538,000us-gaap_LiabilitiesAndStockholdersEquity