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Stock-based compensation
 6 Months Ended
Jul. 31, 2012
Stock-based compensation [Abstract]  
Stock-based compensation [Text Block]
Stock-based compensation. The Company has stock-based compensation awards that can be granted to eligible employees, officers or directors.
 
Three Months Ended July 31,
Six Months Ended July 31,
 
2012
2011
2012
2011
Stock-based compensation expense
$174
$69
$260
$297


The fair value of the outstanding option awards was estimated on the grant dates using the Black-Scholes option pricing model.
 
Six Months Ended July 31,
Fair value assumptions
2012
2011
Expected volatility
57.02% - 66.82%
51.72% - 66.82%
Risk free interest rate
.74% - 3.57%
1.54% - 5.13%
Dividend yield
none
none
Expected life
4.9 - 5.7 years
4.9 - 7.0 years


Option activity
Options
Weighted Average Exercise Price Per Share
Weighted Average Remaining Contractual Term in Years
Aggregate Intrinsic Value
Outstanding on February 1, 2012
843

$11.48

6.9

$430

Granted
158
6.88

 
 
Exercised
(11)
2.94

 
45

Expired or forfeited
(26)
10.25

 
 
Outstanding end of period
964
10.85

7.0
225

 
 
 
 
 
Exercisable end of period
584

$13.37

5.8

$137

Weighted-average fair value of options granted during first six months of 2012
 

$3.37

 
 


Unvested option activity
Unvested Options Outstanding
Weighted Average Price Per Share
Aggregate Intrinsic Value
Outstanding on February 1, 2012
373

$7.84


$212

Granted
158
6.88

 
Vested
(142)
 
 
Expired or forfeited
(9)
7.08

 
Outstanding end of period
380

$6.98


$89



As of July 31, 2012, there was $1.2 million of total unrecognized compensation expense related to unvested stock options. The expense is expected to be recognized over a period of 2.9 years.