Income taxes Components of deferred income tax (Tables)

12 Months Ended

Jan. 31, 2015

Components of deferred income tax [Line Items]

Components of deferred tax assets and liabilities [Table Text Block]

Components of deferred income tax assets	2014		2013
U.S. Federal NOL carryforward	$3,156		$2,298
Non-qualified deferred compensation	2,363		2,358
Research tax credit	2,032		1,965
Foreign NOL carryforward	483		1,004
Foreign tax credit	2,088		1,294
Stock compensation	1,033		1,162
Other accruals not yet deducted	901		581
State NOL carryforward	1,291		1,173
Accrued commissions and incentives	584		814
Accrued pension	735		182
Inventory valuation allowance	430		413
Other	561		217
Inventory uniform capitalization	94		102
Deferred tax assets, gross	15,751		13,563
Valuation allowance	(14,201	)	(11,591	)
Total deferred tax assets, net of valuation allowances	$1,550		$1,972
Components of the deferred income tax liability
Depreciation	$851		$963
Foreign subsidiaries unremitted earnings	863		—
Prepaid	310		231
Total deferred tax liabilities	$2,024		$1,194
Deferred tax asset, net	$(474)		$778
Balance sheet classification
Long-term assets	$0		$1,667
Long-term liability	309		—
Current liabilities	165		889
Total deferred tax assets, net of valuation allowances	$(474)		$778