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Note 6 - Other Receivables - Other Receivables (Details) - USD ($) $ in Thousands | Jan. 31, 2020 | Jan. 31, 2019
--- | --- | ---
Net working capital adjustments receivable from acquisitions |  | $ 55
Other receivables | 7,294 | 4,276
| $ 7,294 | $ 4,331

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- Definition Net working capital adjustments receivable from acquisitions. + References No definition available. + Details
Name: | dsgx_NetWorkingCapitalAdjustmentsReceivableFromAcquisitions
Namespace Prefix: | dsgx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of current assets classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_OtherAssetsCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer. + References No definition available. + Details
Name: | us-gaap_OtherReceivablesNetCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant