Income taxes Components of deferred income tax (Tables)

12 Months Ended

Jan. 31, 2016

Components of deferred income tax [Line Items]

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

Components of deferred income tax assets	2015		2014
U.S. Federal NOL carryforward	$3,044		$3,156
Non-qualified deferred compensation	2,382		2,363
Research tax credit	2,057		2,032
Foreign NOL carryforward	231		483
Foreign tax credit	2,861		2,088
Stock compensation	1,061		1,033
Other accruals not yet deducted	438		901
State NOL carryforward	1,419		1,291
Accrued commissions and incentives	723		584
Accrued pension	—		735
Inventory valuation allowance	73		430
Other	106		561
Inventory uniform capitalization	10		94
Deferred tax assets, gross	14,405		15,751
Valuation allowance	(13,333	)	(14,201	)
Total deferred tax assets, net of valuation allowances	$1,072		$1,550
Components of the deferred income tax liability
Depreciation	$633		$851
Foreign subsidiaries unremitted earnings	412		863
Prepaid	88		310
Total deferred tax liabilities	$1,133		$2,024
Deferred tax liability, net	$(61)		$(474)
Balance sheet classification
Long-term assets	$99		$260
Long-term liability	160		734
Total deferred tax liabilities, net of valuation allowances	$(61)		$(474)