XML 47 R32.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 4 - Fair Value Measurements (Tables) | 12 Months Ended
--- | ---
Jan. 31, 2018
Notes Tables |
Schedule of Derivative Assets at Fair Value [Table Text Block] |
|  |  | Fair Value of Derivatives Designated as Hedge Instruments |  |  |  | Fair Value of Derivatives Not Designated As Hedge Instruments |  |  |  | Fair Value |
Derivative assets: |  |  |  |  |  |  |  |  |  |  |  |
Equity contracts |  |  | - |  |  |  | 1,764 |  |  |  | 1,764 |

X
- Definition Tabular disclosure of derivative assets at fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDerivativeAssetsAtFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration