CONTINGENCIES AND COMMITMENT (Details) $ in Millions	12 Months Ended
Jun. 30, 2021 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Long-term purchase contract for electricity, cancellation fee	$ 0.6
Duration of long-term contract cancellation fees	2 years
Duration of subsequent long-term contract subject to cancellation fees	3 years

Long-Term Contract For Purchase Of Electric Power, Duration Cancellation Fees Payable Under Subsequent Contract

No definition available.

Name:	scx_LongTermContractForPurchaseOfElectricPowerDurationCancellationFeesPayableUnderSubsequentContract
Namespace Prefix:	scx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration