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Note 12 - Debt (Details) NOK in Millions, $ in Millions | Mar. 02, 2016 USD ($) | May. 28, 2014 USD ($) | Jan. 31, 2016 USD ($) | Jan. 31, 2016 NOK | Jan. 31, 2015 USD ($) | May. 27, 2014 USD ($)
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Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Letters of Credit Outstanding, Amount |  |  |  | NOK 0.3 | $ 0.4 |
Revolving Credit Facility [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  | $ 77.0 |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 50.0
Amended Credit Facility [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 77.0 |  |  |  |
Amended Credit Facility [Member] | Equal Quarterly Installments [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Debt Instrument, Term |  | 5 years |  |  |  |
Amended Credit Facility [Member] | No Fixed Repayment Date [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 2.0 |  |  |  |
Senior Secured Credit Facility [Member] | Subsequent Event [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Debt Instrument, Term | 5 years |  |  |  |  |
Equal Quarterly Installments [Member] | Amended Credit Facility [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 75.0 |  |  |  |
Revolving Operating Credit Facility [Member] | Senior Secured Credit Facility [Member] | Subsequent Event [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 150.0 |  |  |  |  |
Line of Credit Borrowings to Support Foreign Exchange and Interest Rate Hedging [Member] | Senior Secured Credit Facility [Member] | Subsequent Event [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 7.5 |  |  |  |  |
Minimum [Member] | Amended Credit Facility [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  | 0.30% |  |  |  |
Minimum [Member] | Senior Secured Credit Facility [Member] | Subsequent Event [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.20% |  |  |  |  |
Minimum [Member] | Base Rate [Member] | Amended Credit Facility [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.00% |  |  |  |
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] | Amended Credit Facility [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 1.50% |  |  |  |
Minimum [Member] | Canada or US Prime Rate, BA, or LIBOR [Member] | Senior Secured Credit Facility [Member] | Subsequent Event [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.00% |  |  |  |  |
Maximum [Member] | Amended Credit Facility [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  | 0.50% |  |  |  |
Maximum [Member] | Senior Secured Credit Facility [Member] | Subsequent Event [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.28% |  |  |  |  |
Maximum [Member] | Base Rate [Member] | Amended Credit Facility [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 1.50% |  |  |  |
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] | Amended Credit Facility [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 3.00% |  |  |  |
Maximum [Member] | Canada or US Prime Rate, BA, or LIBOR [Member] | Senior Secured Credit Facility [Member] | Subsequent Event [Member] |  |  |  |  |  |
Note 12 - Debt (Details) [Line Items] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.00% |  |  |  |  |

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