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Income taxes Components of deferred income tax (Tables) | 12 Months Ended
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Jan. 31, 2013
Components of deferred income tax [Line Items] |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
Components of deferred income tax assets | 2012 |  | 2011 |
U.S. Federal NOL carryforward | $3,680 | $3,728
Non-qualified deferred compensation | 2,092 |  | 1,968 |
Research tax credit | 1,964 |  | 1,858 |
Foreign NOL carryforward | 2,241 |  | 2,726 |
Foreign tax credit | 1,297 |  | 1,300 |
Stock compensation | 1,417 |  | 1,243 |
Other accruals not yet deducted | 1,077 |  | 1,233 |
State NOL carryforward | 1,066 |  | 921 |
Accrued commissions and incentives | 837 |  | 691 |
Accrued pension | 428 |  | 578 |
Inventory valuation allowance | 306 |  | 300 |
Other | 94 |  | 225 |
Inventory uniform capitalization | 132 |  | 128 |
Deferred tax assets, gross | 16,631 |  | 16,899 |
Valuation allowance | (14,180 | ) | (1,934 | )
Total deferred tax assets, net of valuation allowances | $2,451 | $14,965
Components of the deferred income tax liability |  |
Depreciation | $1,041 | $1,733
Prepaid | 340 |  | 319 |
Total deferred tax liabilities | $1,381 | $2,052
Deferred tax asset, net | $1,070 | $12,913
Balance sheet classification |  |
Current assets | $0 | $1,946
Long-term assets | 1,766 |  | 10,967 |
Current liabilities | $696 | $0
Total deferred tax assets, net of valuation allowances | $1,070 | $12,913

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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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