XML 93 R81.htm IDEA: XBRL DOCUMENT
v3.23.2

Income Taxes - Additional information (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 31, 2023 | Jul. 31, 2022 | Jul. 31, 2023 | Jul. 31, 2022
Income Taxes |  |  |  |
Percentage of income before income taxes | 27.00% | 27.80% | 24.70% | 26.00%

X
- Definition Income tax expense expressed as a percentage of income before taxes. + References No definition available. + Details
Name: | dsgx_IncomeBeforeTaxesPercent
Namespace Prefix: | dsgx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition N/A + References No definition available. + Details
Name: | dsgx_IncomeTaxDisclosureLineItems
Namespace Prefix: | dsgx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration