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v3.23.2

Inventory (Details) $ in Millions | 6 Months Ended
--- | ---
Jul. 31, 2023 USD ($)
Cost of revenues |
Inventory |
Provision for excess or obsolete inventories | $ 0.1

X
- Definition The amount of provision for excess and obsolete inventories. + References No definition available. + Details
Name: | dsgx_ProvisionForExcessOrObsoleteInventories
Namespace Prefix: | dsgx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_InventoryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |