Inventory (Narrative) (Details) R in Millions, $ in Millions	9 Months Ended
Mar. 31, 2023 ZAR (R)	Mar. 31, 2023 USD ($)	Jun. 30, 2022 USD ($)
Inventory [Line Items]
Finished goods subject to sale restrictions \| $		$ 9.2	$ 13.7
Amount per month of purchased inventory agreement \| R	R 10

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_InventoryLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration