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Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 2,619us-gaap_CashAndCashEquivalentsAtCarryingValue $ 3,550us-gaap_CashAndCashEquivalentsAtCarryingValue
Accounts receivable-trade, net of allowance of $275 and $315 at March 31, 2015 and December 31, 2014 12,445us-gaap_AccountsReceivableNetCurrent 11,877us-gaap_AccountsReceivableNetCurrent
Inventories, net of allowance of $91 and $73 at March 31, 2015 and December 31, 2014 3,128us-gaap_InventoryNet 2,769us-gaap_InventoryNet
Cost and estimated earnings in excess of billings on uncompleted contracts 3,630us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear 2,989us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear
Prepaid expenses and other current assets 682us-gaap_PrepaidExpenseAndOtherAssetsCurrent 750us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Total current assets 22,504us-gaap_AssetsCurrent 21,935us-gaap_AssetsCurrent
Property, plant and equipment, net 8,449us-gaap_PropertyPlantAndEquipmentNet 8,373us-gaap_PropertyPlantAndEquipmentNet
Advances to and investments in foreign joint ventures 12,105us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures 12,054us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Other assets 232us-gaap_OtherAssetsNoncurrent 242us-gaap_OtherAssetsNoncurrent
Long-term assets held for sale 650us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssetsNoncurrent 650us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssetsNoncurrent
Total assets 43,940us-gaap_Assets 43,254us-gaap_Assets
Current liabilities:    
Accounts payable 7,319us-gaap_AccountsPayableCurrent 6,447us-gaap_AccountsPayableCurrent
Accrued payroll and benefits 985us-gaap_EmployeeRelatedLiabilitiesCurrent 1,145us-gaap_EmployeeRelatedLiabilitiesCurrent
Other accrued expenses 371us-gaap_OtherAccruedLiabilitiesCurrent 640us-gaap_OtherAccruedLiabilitiesCurrent
Billings in excess of costs and estimated earnings on uncompleted contracts 2,174us-gaap_BillingsInExcessOfCostCurrent 1,983us-gaap_BillingsInExcessOfCostCurrent
Short-term portion of long-term debt 267us-gaap_LongTermDebtCurrent 222us-gaap_LongTermDebtCurrent
Other current liabilities 179us-gaap_OtherLiabilitiesCurrent 150us-gaap_OtherLiabilitiesCurrent
Total current liabilities 11,295us-gaap_LiabilitiesCurrent 10,587us-gaap_LiabilitiesCurrent
Long-term note payable 3,711us-gaap_LongTermNotesPayable 3,778us-gaap_LongTermNotesPayable
Deferred income taxes 2,969us-gaap_DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent 3,046us-gaap_DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent
Deferred compensation 294us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent 290us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent
Total liabilities 18,269us-gaap_Liabilities 17,701us-gaap_Liabilities
Convertible preferred stock:    
Redeemable convertible preferred stock, Series A, net of discount of $707 at March 31, 2015 and $719 at December 31, 2014; $0.001 par value, 1,000,000 shares authorized, issued and outstanding at March 31, 2015 and December 31, 2014 4,293us-gaap_TemporaryEquityCarryingAmountAttributableToParent 4,281us-gaap_TemporaryEquityCarryingAmountAttributableToParent
Stockholders’ equity:    
Common stock; $0.001 par value, 50,000,000 shares authorized, 8,249,458 and 8,185,323 shares issued and outstanding at March 31, 2015 and December 31, 2014 8us-gaap_CommonStockValue 8us-gaap_CommonStockValue
Treasury stock, at cost (131,928 shares at March 31, 2015 and 111,640 shares at December 31, 2014) (792)us-gaap_TreasuryStockValue (722)us-gaap_TreasuryStockValue
Additional paid-in capital 11,554us-gaap_AdditionalPaidInCapitalCommonStock 11,418us-gaap_AdditionalPaidInCapitalCommonStock
Accumulated other comprehensive income 704us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax 851us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
Retained earnings; including accumulated statutory reserves in equity method investments of $2,100 at March 31, 2015 and December 31, 2014 9,904us-gaap_RetainedEarningsAccumulatedDeficit 9,717us-gaap_RetainedEarningsAccumulatedDeficit
Total stockholders’ equity 21,378us-gaap_StockholdersEquity 21,272us-gaap_StockholdersEquity
Total liabilities and stockholders’ equity $ 43,940us-gaap_LiabilitiesAndStockholdersEquity $ 43,254us-gaap_LiabilitiesAndStockholdersEquity