XML 43 R31.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Note 7 - Related Party Transactions (Tables) | 6 Months Ended
--- | ---
Oct. 31, 2018
Notes Tables |
Schedule of Non Voting Revenues Interest and Non Voting Profits Interests [Table Text Block] |
|  | Three Months Ended October 31, |  |  | Six Months Ended October 31, |
($ in thousands) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Non-voting revenues interest in EAM |  | $ | 2,095 |  |  | $ | 2,039 |  |  | $ | 4,063 |  |  | $ | 4,017 |
Non-voting profits interest in EAM |  |  | 289 |  |  |  | 198 |  |  |  | 592 |  |  |  | 356 |
|  | $ | 2,384 |  |  | $ | 2,237 |  |  | $ | 4,655 |  |  | $ | 4,373 |

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

X
- Definition Schedule of non voting revenues interest and non voting profits interests. + References No definition available. + Details
Name: | valu_ScheduleOfNonVotingRevenuesInterestAndNonVotingProfitsInterestsTableTextBlock
Namespace Prefix: | valu_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration