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Other Receivables - Additional information (Details) - USD ($) $ in Millions	Jan. 31, 2023	Jan. 31, 2022
Other Receivables
Capital adjustments receivable from acquisitions is recoverable from amounts held in escrow	$ 0.4	$ 0.3

X

- Definition

Amount recoverable from funds held In escrow related to acquisitions.

+ References

No definition available.

+ Details

Name:	dsgx_AmountsRecoverableFromFundsHeldInEscrow
Namespace Prefix:	dsgx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	dsgx_OtherReceivablesDisclosureAbstract
Namespace Prefix:	dsgx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration