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Income taxes Components of deferred income tax (Tables) | 12 Months Ended
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Jan. 31, 2014
Components of deferred income tax [Line Items] |
Components of deferred tax assets and liabilities [Table Text Block] |
Components of deferred income tax assets | 2013 |  | 2012 |
U.S. Federal NOL carryforward | $2,298 | $3,680
Non-qualified deferred compensation | 2,358 |  | 2,092 |
Research tax credit | 1,965 |  | 1,964 |
Foreign NOL carryforward | 1,004 |  | 612 |
Foreign tax credit | 1,294 |  | 1,297 |
Stock compensation | 1,162 |  | 1,417 |
Other accruals not yet deducted | 581 |  | 1,086 |
State NOL carryforward | 1,173 |  | 1,066 |
Accrued commissions and incentives | 814 |  | 837 |
Accrued pension | 182 |  | 428 |
Inventory valuation allowance | 413 |  | 306 |
Other | 217 |  | 94 |
Inventory uniform capitalization | 102 |  | 132 |
Deferred tax assets, gross | 13,563 |  | 15,011 |
Valuation allowance | (11,591 | ) | (12,960 | )
Total deferred tax assets, net of valuation allowances | $1,972 | $2,051
Components of the deferred income tax liability |  |
Depreciation | $963 | $1,040
Prepaid | 231 |  | 340 |
Total deferred tax liabilities | $1,194 | $1,380
Deferred tax asset, net | $778 | $671
Balance sheet classification |  |
Long-term assets | $1,667 | $1,358
Current liabilities | 889 |  | 687 |
Total deferred tax assets, net of valuation allowances | $778 | $671

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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