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Significant accounting policies Inventories (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Jan. 31, 2014 | Jan. 31, 2013
Inventories [Abstract] |  |
Inventory Write-down | $ 600,000 |
Raw materials | 27,330,000 | 31,820,000
Work in process | 2,855,000 | 2,333,000
Finished goods | 4,311,000 | 4,051,000
Subtotal | 34,496,000 | 38,204,000
Less allowances | 949,000 | 675,000
Inventories, net | $ 33,547,000 | $ 37,529,000

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