Income taxes Components of deferred income tax (Tables)

12 Months Ended

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