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Other Receivables - Additional Information (Details) - USD ($) $ in Millions	Jul. 31, 2022	Jan. 31, 2022
Note To Financial Statement Details Textual
Amounts Recoverable from Funds Held in Escrow	$ 0.1	$ 0.3

X

- Definition

Amount recoverable from funds held In escrow related to acquisitions.

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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