Financial instruments - Summary of Interest Income and Interest Expense for Financial Assets or Financial Liabilities that are Not at Fair Value Through Profit or Loss (Details) - USD ($)	12 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Disclosure of detailed information about financial instruments [abstract]
Interest income	$ (242,000)	$ (25,000)
Interest expense	3,953,000	6,270,000
Accretion expense	301,000	394,000
Interest expense (net)	$ 4,012,000	$ 6,639,000

The amount of interest income for financial assets not at fair value through profit or loss and (interest expenses) for financial liabilities not at fair value through profit or loss, net.

No definition available.

Name:	sang_InterestIncomeForFinancialAssetsNotAtFairValueThroughProfitOrLossAndInterestExpensesForFinancialLiabilitiesNotAtFairValueThroughProfitOrLossNet
Namespace Prefix:	sang_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration