Schedule of Rental Equipment (Details) - USD ($)	Sep. 30, 2022	Sep. 30, 2021
Rental Equipment
Rental equipment	$ 228,000
Accumulated depreciation	(5,000)	$ (0)
Net book value	$ 223,000

Rental equipment excluding property plant and qeqipment.

No definition available.

Name:	OPTI_RentalEquipmentExcludingPropertyPlantAndQeqipment
Namespace Prefix:	OPTI_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant