Subsequent Events (Details) - Subsequent Event [Member]	1 Months Ended
Jan. 01, 2020 USD ($) shares
Subsequent Events (Textual)
Advance for shares to issued, shares \| shares	20,000
Advance for shares to issued, value \| $	$ 30,000

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

No definition available.

Name:	oacl_AdvanceForSharesToIssuedValue
Namespace Prefix:	oacl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration