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Stock-based compensation | 9 Months Ended
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Oct. 31, 2013
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 October 31, | Nine Months Ended October 31,
| 2013 |  | 2012 |  | 2013 |  | 2012 |
Stock-based compensation expense |  | $27 |  |  | $106 |  |  | $95 |  |  | $366 |
The fair value of the outstanding option awards was estimated on the grant dates using the Black-Scholes option pricing model.
| Nine Months Ended October 31,
Fair value assumptions | 2013 | 2012
Expected volatility | 49.65% - 65.54% | 58.12% - 66.82%
Risk free interest rate | .74% - 2.82% | .74% - 2.82%
Dividend yield | none | none
Expected life | 4.9 - 5.7 years | 4.9 - 5.7 years
Option activity | Options | Weighted Average Exercise Price Per Share | Weighted Average Remaining Contractual Term in Years | Aggregate Intrinsic Value
Outstanding at January 31, 2013 | 969 |  |  | $10.77 |  | 6.6 |  | $40 |
Granted | 102 |  | 10.50 |  |  |
Exercised | (135 | ) | 6.72 |  |  | 506 |
Expired or forfeited | (55 | ) | 12.64 |  |  |
Outstanding end of period | 881 |  | 11.25 |  | 6.3 | 2,770 |
Exercisable end of period | 602 |  |  | $12.67 |  | 5.1 |  | $1,748 |
Unvested option activity | Unvested Options Outstanding | Weighted Average Exercise Price Per Share | Aggregate Intrinsic Value
Outstanding at January 31, 2013 | 383 |  |  | $6.91 |  |  | $4 |
Granted | 102 |  | 10.50 |  |
Vested | (181 | ) |  |
Expired or forfeited | (25 | ) | 6.96 |  |
Outstanding end of period | 279 |  |  | $8.18 |  |  | $1,022 |
As of October 31, 2013, there was $966 thousand of total unrecognized compensation expense related to unvested stock options. The expense is expected to be recognized over a period of 2.6 years.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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