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Stock-Based Compensation and Stockholders' Rights (Restricted Stock Units) (Details) - USD ($) | 12 Months Ended
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Jan. 31, 2018 | Jan. 31, 2017 | Jan. 31, 2016
Weighted- average fair value of restricted stock units |  |  |
Aggregate fair value of stock awards vested during the period | $ 1,260,000 | $ 902,000 | $ 593,000
Restricted Stock or Stock Units [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 504,404 | 87,284 | 75,174
Expense for 12 months ended | $ 830,000 | $ 609,000 | $ 493,000
Unrecognized compensation at cost | $ 2,332,000 |  |
Restricted Stock Units |  |  |
Outstanding at beginning of year | 491,284 | 657,174 | 812,626
Granted | 504,404 | 87,284 | 75,174
Vested | (259,284) | (223,174) | (212,626)
Forfeited | (44,000) | (30,000) | (18,000)
Outstanding at end of year | 692,404 | 491,284 | 657,174
Weighted- average fair value of restricted stock units |  |  |
Outstanding at beginning of year | $ 2.46 | $ 2.34 | $ 2.24
Granted | 4.95 | 3.89 | 2.76
Vested | 4.86 | 4.04 | 2.79
Forfeited | 4.42 | 2.61 | 2.74
Outstanding at end of year | $ 4.25 | $ 2.46 | $ 2.34
2011 Plan [Member] | 40,404 Restricted Stock Units, issued 6/20/2017, vesting over 1 year [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 40,404 |  |
Maximum term of stock options |  | 1 year |
Expense for 12 months ended | $ 133,000 | $ 0 | $ 0
Unrecognized compensation at cost | $ 67,000 |  |
Restricted Stock Units |  |  |
Granted | 40,404 |  |
2011 Plan [Member] | 464,000 Restricted Stock Units, issued on 6/20/2017 vesting over 5 years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 464,000 |  |
Maximum term of stock options |  | 5 years |
Expense for 12 months ended | $ 292,000 | $ 0 | 0
Unrecognized compensation at cost | $ 1,901,000 |  |
Restricted Stock Units |  |  |
Granted | 464,000 |  |
2011 Plan [Member] | 51,284 Restricted Stock Units, issued 6/21/2016, vesting over 1 years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 51,284 |  |
Maximum term of stock options |  | 1 year |
Expense for 12 months ended | $ 67,000 | $ 133,000 | 0
Unrecognized compensation at cost | $ 0 |  |
Restricted Stock Units |  |  |
Granted | 51,284 |  |
2011 Plan [Member] | 36,000 Restricted Stock Units, issued 6/21/2016, vesting over 3 years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 36,000 |  |
Maximum term of stock options |  | 3 years |
Expense for 12 months ended | $ 16,000 | $ 32,000 | 0
Unrecognized compensation at cost | $ 0 |  |
Restricted Stock Units |  |  |
Granted | 36,000 |  |
2011 Plan [Member] | 48,000 Restricted Stock Units, issued 6/22/2015, vesting over 4 years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 48,000 |  |
Maximum term of stock options |  | 4 years |
Expense for 12 months ended | $ 33,000 | $ 32,000 | 22,000
Unrecognized compensation at cost | $ 44,000 |  |
Restricted Stock Units |  |  |
Granted | 48,000 |  |
2011 Plan [Member] | 27,124 Restricted Stock Units, issued 6/22/2015, vesting over 1 years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 27,174 |  |
Maximum term of stock options |  | 1 year |
Expense for 12 months ended | $ 0 | $ 25,000 | 50,000
Unrecognized compensation at cost | $ 0 |  |
Restricted Stock Units |  |  |
Granted | 27,174 |  |
2011 Plan [Member] | 490,000 units of restricted stock issued on 6/24/2014 vesting over 5 years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 490,000 |  |
Maximum term of stock options | 5 years |  |
Expense for 12 months ended | $ 240,000 | $ 240,000 | 246,000
Unrecognized compensation at cost | $ 320,000 |  |
Restricted Stock Units |  |  |
Granted | 490,000 |  |
2011 Plan [Member] | 28,626 Restricted Stock Units, issued 6/24/2014, vesting over 5 years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 28,626 |  |
Maximum term of stock options |  | 5 years |
Expense for 12 months ended | $ 0 | $ 0 | 25,000
Unrecognized compensation at cost | $ 0 |  |
Restricted Stock Units |  |  |
Granted | 28,626 |  |
2011 Plan [Member] | 520,000 Restricted Stock Units, issued 6/19/2012, vesting over 5 years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 520,000 |  |
Maximum term of stock options |  | 5 years |
Expense for 12 months ended | $ 49,000 | $ 147,000 | $ 150,000
Unrecognized compensation at cost | $ 0 |  |
Restricted Stock Units |  |  |
Granted | 520,000 |  |
2011 Plan [Member] | Restricted Stock or Stock Units [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Granted | 504,404 |  |
Restricted Stock Units |  |  |
Granted | 504,404 |  |
2007 Plan [Member] | 382,500 Restricted Stock Units, issued 6/16/2009, Vesting over Five Years [Member] |  |  |
Summary of restricted stock and stock unit awards |  |  |
Maximum term of stock options |  | 5 years |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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