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Stock-based compensation Stock Compensation (Tables)
 6 Months Ended
Jul. 31, 2015
Stock-based compensation [Abstract]  
Stock-based compensation expense [Table Text Block]
 
Three Months Ended July 31,
Six Months Ended July 31,
 
2015

2014

2015

2014

Stock-based compensation expense (benefit)

($96
)

$90


($37
)

($291
)
Restricted stock based compensation expense (benefit)

$169


$176


$258


$106
Fair value assumptions [Table Text Block]
 
Six Months Ended July 31,
Fair value assumptions
2015
2014
Risk free interest rate
.74% - 1.77%
.74% - 2.19%
Expected volatility
40.88% - 59.39%
40.88% - 60.26%
Expected life
4.9 - 5.1 years
4.9 - 5.1 years
Dividend yield
none
none
Option activity [Table Text Block]

Option activity
Options
Weighted Average Exercise Price
Weighted Average Remaining Contractual Term
Aggregate Intrinsic Value
Outstanding at January 31, 2015
764


$11.45

5.7

$—

Granted
51

6.38

 
 
Expired or forfeited
(59
)
10.08

 
 
Outstanding end of period
756

11.22

5.7
1

 
 
 
 
 
Exercisable end of period
566


$11.81

4.7

$—
Unvested option activity [Table Text Block]
Unvested option activity
Options
Weighted Average Grant Date Fair Value
Aggregate Intrinsic Value
Outstanding at January 31, 2015
232


$10.11


$—

Granted
51

6.38

 
Vested
(87
)
 
 
Expired or forfeited
(7
)
10.24

 
Outstanding end of period
189


$9.44


$—
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
Restricted stock activity
Restricted Shares
Weighted Average Grant Price Per Share
Aggregate Intrinsic Value
Outstanding at January 31, 2015
33


$11.53


$186

Granted
44



 
Outstanding end of period
77


$8.6


$458