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Stock-based compensation | 6 Months Ended
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Jul. 31, 2017
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,
| 2017 |  | 2016 |  | 2017 |  | 2016 |
Stock-based compensation expense |  | $65 |  |  | $68 |  |  | $59 |  |  | $161 |
Restricted stock-based compensation expense |  | $452 |  |  | $390 |  |  | $647 |  |  | $668 |
The decrease in the six months restricted stock-based compensation expense relates to grants that vested in January 2017, and the increase in the three months comparison is due to new grants that were made in June 2017. Stock Options. 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 | 2017 | 2016
Expected volatility | 43.2% | 43.2%
Risk free interest rate | 1.2% | 1.2%
Dividend yield | 0 | 0
Expected life | 5.0 | 5.0
Option activity | Options | Weighted Average Exercise Price | Weighted Average Remaining Contractual Term | Aggregate Intrinsic Value
Outstanding at January 31, 2017 | 524 |  |  | $11.55 |  | 4.5 |  | $534 |
Exercised | (24 | ) | 6.74 |  |  | 29 |
Expired or forfeited | (82 | ) | 23.49 |  |  |
Outstanding end of period | 418 |  | 9.49 |  | 4.5 | 274 |
Exercisable end of period | 383 |  |  | $9.59 |  | 4.2 |  | $249 |
Unvested option activity | Options | Weighted Average Grant Date Fair Value | Aggregate Intrinsic Value
Outstanding at January 31, 2017 | 74 |  |  | $9.31 |  |  | $69 |
Vested | (32 | ) |  |
Expired or forfeited | (7 | ) | 11.97 |  |
Outstanding end of period | 35 |  |  | $8.42 |  |  | $25 |
As of July 31, 2017, there was $0.1 million of total unrecognized compensation expense related to unvested stock options. The expense is expected to be recognized over a period of 2.0 years. Restricted stock. The following table summarizes restricted stock activity for the year:
Restricted stock activity | Restricted Shares | Weighted Average Grant Price Per Share | Aggregate Intrinsic Value
Outstanding at January 31, 2017 | 290 |  |  | $8.75 |  |  | $2,540 |
Granted | 175 |  | 8.02 |  |
Issued | (55 | ) |  |
Forfeited | (38 | ) | 7.85 |  |
Outstanding end of period | 372 |  |  | $7.93 |  |  | $2,988 |
As of July 31, 2017, there was $1.9 million of unrecognized compensation expense related to unvested restricted stock granted under the plans. The cost is expected to be recognized over the weighted-average period of 2.4 years.

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- Definition Stock-based compensation [Abstract] + References No definition available. + Details
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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 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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