XML 101 R85.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Note 17 - Income Taxes - Income Tax Loss Carryforwards Expiration Dates (Details) $ in Thousands | Jan. 31, 2017 USD ($)
--- | ---
Operating loss carryforwards | $ 76,305
Expire Next 12 Months [Member] |
Operating loss carryforwards | 283
Expire Year Two [Member] |
Operating loss carryforwards | 1,766
Expire Year Three [Member] |
Operating loss carryforwards | 671
Expire Year Four [Member] |
Operating loss carryforwards | 83
Expire Year Five [Member] |
Operating loss carryforwards |
Expire Thereafter [Member] |
Operating loss carryforwards | 73,502
United States [Member] |
Operating loss carryforwards | 13,711
United States [Member] | Expire Next 12 Months [Member] |
Operating loss carryforwards |
United States [Member] | Expire Year Two [Member] |
Operating loss carryforwards | 1,766
United States [Member] | Expire Year Three [Member] |
Operating loss carryforwards |
United States [Member] | Expire Year Four [Member] |
Operating loss carryforwards |
United States [Member] | Expire Year Five [Member] |
Operating loss carryforwards |
United States [Member] | Expire Thereafter [Member] |
Operating loss carryforwards | 11,945
EMEA [Member] |
Operating loss carryforwards | 55,045
EMEA [Member] | Expire Next 12 Months [Member] |
Operating loss carryforwards | 283
EMEA [Member] | Expire Year Two [Member] |
Operating loss carryforwards |
EMEA [Member] | Expire Year Three [Member] |
Operating loss carryforwards |
EMEA [Member] | Expire Year Four [Member] |
Operating loss carryforwards |
EMEA [Member] | Expire Year Five [Member] |
Operating loss carryforwards |
EMEA [Member] | Expire Thereafter [Member] |
Operating loss carryforwards | 54,762
Asia Pacific [Member] |
Operating loss carryforwards | 7,549
Asia Pacific [Member] | Expire Next 12 Months [Member] |
Operating loss carryforwards |
Asia Pacific [Member] | Expire Year Two [Member] |
Operating loss carryforwards |
Asia Pacific [Member] | Expire Year Three [Member] |
Operating loss carryforwards | 671
Asia Pacific [Member] | Expire Year Four [Member] |
Operating loss carryforwards | 83
Asia Pacific [Member] | Expire Year Five [Member] |
Operating loss carryforwards |
Asia Pacific [Member] | Expire Thereafter [Member] |
Operating loss carryforwards | $ 6,795

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=dsgx_ExpireNext12MonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=dsgx_ExpireYearTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=dsgx_ExpireYearThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=dsgx_ExpireYearFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=dsgx_ExpireYearFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxCreditCarryforwardAxis=dsgx_ExpireThereafterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=dsgx_UnitedStatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_EMEAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_AsiaPacificMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |