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Schedule II - Valuation And Qualifying Accounts (Details) - Valuation and Qualifying Accounts (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
|---|---|---|
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Jan. 31, 2014
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Jan. 31, 2013
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Allowance for Doubtful Accounts [Member]
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| Valuation Allowance [Line Items] | ||
| Balance at the beginning of year | $ 24 | $ 87 |
| Charged to cost and expense (recovery) | 16 | (38) |
| Deductions | 0 | (25) |
| Other changes add (deduct) | 0 | 0 |
| Balance at end of year | 40 | 24 |
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Valuation Allowance of Deferred Tax Assets [Member]
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| Valuation Allowance [Line Items] | ||
| Balance at the beginning of year | 17,749 | 17,130 |
| Charged to cost and expense (recovery) | 0 | 0 |
| Deductions | 0 | 0 |
| Other changes add (deduct) | (1,074) | 619 |
| Balance at end of year | 16,675 | 17,749 |
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Inventory Valuation Reserve [Member]
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| Valuation Allowance [Line Items] | ||
| Balance at the beginning of year | 631 | 1,792 |
| Charged to cost and expense (recovery) | 0 | 0 |
| Deductions | 0 | 0 |
| Other changes add (deduct) | (631) | (1,161) |
| Balance at end of year | $ 0 | $ 631 |