Development costs - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023
Development Costs [Abstract]
Amortization of development costs	$ 4,480	$ 2,705
Engineering expenditures	$ 35,063	$ 34,765

Adjustments for amortization expense for development costs to reconcile profit (loss) to net cash flow from (used in) operating activities.

No definition available.

Name:	sang_AdjustmentsForAmortisationExpenseOfDevelopmentCosts
Namespace Prefix:	sang_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration