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Income taxes Components of income tax (benefit) expense (Tables)
 12 Months Ended
Jan. 31, 2015
Income taxes [Abstract]  
Components of income tax expense (benefit) [Table Text Block]
Components of income tax expense (benefit)
 
 
Current
 
 
Federal
$45
($245)
Foreign
1,834

3,024

State and other
(77
)
(82
)
Subtotal
1,802

2,697

Deferred
 
 
Federal
—

(2,715
)
Foreign
1,439

(475
)
State and other
—

—

Subtotal
1,439

(3,190
)
Total
$3,241
$(493)
Effective income tax rate reconciliation[Table Text Block]
 
2014

2013

Tax benefit at federal statutory rate
$1,130
$4,182
Domestic valuation allowance
1,778

—

Valuation allowance for state NOLs
119

—

Differences in foreign tax rate
455

(3,049
)
Foreign tax credit
(793
)
—

Research tax credit
(29
)
—

Repatriation
847

—

Valuation allowance for foreign NOLs
15

(1,209
)
Nontaxable income from the Canadian joint venture
(666
)
(179
)
State taxes, net of federal benefit
(62
)
(192
)
All other, net expense
447

(46
)
Total

$3,241


($493
)