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v2.4.0.8

Segment Information (narrative) (detail) | Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2012
--- | --- | --- | ---
Export [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales Percentage | 9.20% | 9.80% | 9.40%
Green Giant Vegetables [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales Percentage | 13.00% | 13.00% | 13.00%
Fruit And Vegetable Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Assets Percentage | 99.00% | 99.00% | 99.00%
Income Loss Fom Continuing Operations Before Income Taxes Percentage | 93.00% | 101.00% | 107.00%

X
- Definition Percentage of total assets + References No definition available. + Details
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Namespace Prefix: | senea_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Income Loss from continuing operation before taxes as a percentage + References No definition available. + Details
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Namespace Prefix: | senea_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of net product revenue to total net revenue from the sale of goods as of year end. + References No definition available. + Details
Name: | us-gaap_SalesRevenueGoodsNetPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration