Name:	oacl_CustomerDeposits
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

No definition available.

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Data Type:	num:percentItemType
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Period Type:	duration

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

No definition available.

Name:	oacl_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateRevised
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represent the number of customer under credit risk.

No definition available.

Name:	oacl_NumberOfCustomer
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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Amount represent the prepayments and deferred expenses.

No definition available.

Name:	oacl_PrepaymentsAndDeferredExpenses
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represent the amount purchase from vendor.

No definition available.

Name:	oacl_PurchaseFromvendor
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represent the number of employee under share based compensation.

No definition available.

Name:	oacl_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfEmployees
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Data Type:	xbrli:integerItemType
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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Name:	us-gaap_CashAndCashEquivalentsAtCarryingValue
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Period Type:	instant

The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

No definition available.

Name:	us-gaap_CashUninsuredAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Name:	us-gaap_ConcentrationRiskPercentage1
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Data Type:	num:percentItemType
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Period Type:	duration

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Price of a single share of a number of saleable stocks of a company.

No definition available.