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Costs and Estimated Earnings in Excess of Billings - Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts (Detail) (USD $)
Dec. 31, 2014
Sep. 30, 2014
Costs in Excess of Billings on Uncompleted Contracts or Programs [Abstract]    
Costs incurred on uncompleted contracts $ 2,740,000us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms $ 846,000us-gaap_CostsInExcessOfBillingsOnUncompletedContractsOrPrograms
Estimated earnings 910,000us-gaap_UnbilledReceivablesNotBillableAtBalanceSheetDate 279,000us-gaap_UnbilledReceivablesNotBillableAtBalanceSheetDate
Costs and estimated earnings in excess of billings on uncompleted contracts 3,650,000us-gaap_ContractsReceivableClaimsAndUncertainAmounts 1,125,000us-gaap_ContractsReceivableClaimsAndUncertainAmounts
Costs and estimated earnings in excess of billings on uncompleted contracts 3,650,000us-gaap_ContractsReceivableClaimsAndUncertainAmounts 1,125,000us-gaap_ContractsReceivableClaimsAndUncertainAmounts
Billings to date 1,292,000us-gaap_AccountsReceivableBilledForLongTermContractsOrPrograms 781,000us-gaap_AccountsReceivableBilledForLongTermContractsOrPrograms
Costs and estimated earnings in excess of billings $ 2,358,000us-gaap_ReceivablesLongTermContractsOrPrograms $ 344,000us-gaap_ReceivablesLongTermContractsOrPrograms