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Net amount, after netting of contract with customer assets, of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

No definition available.

Name:	orn_ContractWithCustomerLiabilityNetCurrent
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Inventory for Long-term Contracts or Programs, Costs Incurred on Uncompleted Contracts

No definition available.

Name:	orn_InventoryForLongTermContractsOrProgramsCostsIncurredOnUncompletedContracts
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Inventory for Long-term Contracts or Programs, Estimated Earnings on Uncompleted Contracts

No definition available.

Name:	orn_InventoryForLongTermContractsOrProgramsEstimatedEarningsOnUncompletedContracts
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Total amounts billed for services rendered or to be rendered on uncompleted customer contracts.

No definition available.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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- References

No definition available.

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Amount before valuation and LIFO reserves, and progress payments, of inventory associated with long-term contracts, expected to be sold, or consumed within one year or operating cycle, if longer.

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-Publisher FASB
-Name Accounting Standards Codification
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