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Summary of Business and Significant Accounting Policies (Self-Insurance) (Details) - USD ($) | Jan. 31, 2018 | Jan. 31, 2017
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Loss Contingencies [Line Items] |  |
Discount rate | 2.00% | 2.00%
Product and General Liability [Member] |  |
Loss Contingencies [Line Items] |  |
Self insurance reserve | $ 250,000 |
Workers Compensation [Member] |  |
Loss Contingencies [Line Items] |  |
Self insurance reserve | 250,000 |
Automobile Losses [Member] |  |
Loss Contingencies [Line Items] |  |
Self insurance reserve | $ 50,000 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Assumed Discount Rate, Self Insurance Accrual + References No definition available. + Details
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- Definition Self Insurance Coverage Amount + References No definition available. + Details
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- Details
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- Details
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- Details
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