Other Payables (Details Textual)	Mar. 31, 2019 USD ($) shares
Other Payables (Textual)
Advances for shares to be issued (in shares) \| shares	41,000
Advances for shares to be issued \| $	$ 53,300

Represents information related to advances for shares to be issued in shares.

No definition available.

Name:	oacl_AdvancesForSharesToBeIssuedInShares
Namespace Prefix:	oacl_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant