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Note 6 - Other Receivables - Other Receivables (Details) - USD ($) $ in Thousands | Jan. 31, 2018 | Jan. 31, 2017
--- | --- | ---
Net working capital adjustments receivable from acquisitions | $ 118 | $ 565
Other receivables | 3,053 | 3,144
| $ 3,171 | $ 3,709

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- Definition Net working capital adjustments receivable from 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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- Definition Amount of current assets classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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
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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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant