Other Payables (Details) - USD ($)	Jun. 30, 2020	Mar. 31, 2020
Payables and Accruals [Abstract]
Advances for shares to be issued	$ 667	$ 8,167
Others	229	244
Other payables	$ 896	$ 8,411

Amount represent advances for shares to be issued.

No definition available.

Name:	oacl_AdvancesForSharesToBeIssued
Namespace Prefix:	oacl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant