XML 92 R76.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Note 16 - Stock-based Compensation Plans Summary of Nonvested Share (Details) - $ / shares | 12 Months Ended
--- | ---
Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 170,932 | 0 | 215,000
Granted, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 4.46 | $ 0 | $ 3.47
Shareholder-Approved Stock Option Plan [Member] |  |  |
Stock Options Outstanding (in shares) | 53,578 | 123,854 |
Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 2.52 | $ 2.56 |
Vested (in shares) | (72,218) | (70,276) |
Vested, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 3.70 | $ 1.92 |
Stock Options Outstanding (in shares) | 152,292 | 53,578 | 123,854
Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 4.12 | $ 2.52 | $ 2.56
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 170,932 |  |
Granted, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 4.46 |  |

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of non-vested options outstanding. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of options vested. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=dsgx_ShareholderapprovedStockOptionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |