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Note 16 - Stock-based Compensation Plans (Tables) | 12 Months Ended
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Jan. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
Year Ended |  | January 31, 2016 |  |  | January 31, 2015 |  |  | January 31, 2014 |
Cost of revenues |  |  | 24 |  |  |  | 45 |  |  |  | 54 |
Sales and marketing |  |  | 41 |  |  |  | 70 |  |  |  | 538 |
Research and development |  |  | - |  |  |  | 2 |  |  |  | 12 |
General and administrative |  |  | 1,512 |  |  |  | 1,426 |  |  |  | 1,138 |
Other charges |  |  | - |  |  |  | - |  |  |  | 781 |
Effect on net income |  |  | 1,577 |  |  |  | 1,543 |  |  |  | 2,523 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
Year Ended |  | January 31, 2015 |
Expected dividend yield (%) |  |  | - |
Expected volatility (%) |  |  | 25.4 |
Risk-free rate (%) |  |  | 1.5 |
Expected option life (years) |  |  | 5 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of Stock Options Outstanding |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Life (years) |  |  | Aggregate Intrinsic Value (in millions) |
Balance at January 31, 2014 |  |  | 1,139,853 |  |  | $ | 4.39 |  |  |  |  |  |  |  |  |
Granted |  |  | 215,000 |  |  | $ | 13.77 |  |  |  |  |  |  |  |  |
Exercised |  |  | (220,138 | ) |  | $ | 3.49 |  |  |  |  |  |  |  |  |
Surrendered for Shares |  |  | (175,000 | ) |  | $ | 4.53 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (6,451 | ) |  | $ | 5.72 |  |  |  |  |  |  |  |  |
Balance at January 31, 2015 |  |  | 953,264 |  |  | $ | 6.33 |  |  |  | 2.5 |  |  |  | 10.6 |
Exercised |  |  | (37,500 | ) |  | $ | 4.18 |  |  |  |  |  |  |  |  |
Surrendered for Shares |  |  | (446,875 | ) |  | $ | 2.59 |  |  |  |  |  |  |  |  |
Balance at January 31, 2016 |  |  | 468,889 |  |  | $ | 8.25 |  |  |  | 3.5 |  |  |  | 5.2 |
Vested or expected to vest at January 31, 2016 |  |  | 450,589 |  |  | $ | 8.18 |  |  |  | 3.5 |  |  |  | 5.0 |
Exercisable at January 31, 2016 |  |  | 292,811 |  |  | $ | 6.54 |  |  |  | 2.6 |  |  |  | 3.7 |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
|  | Options Outstanding |  |  | Options Exercisable |
Range of Exercise Prices |  | Weighted Average Exercise Price |  |  | Number of Stock Options |  |  | Weighted Average Remaining Contractual Life (years) |  |  | Weighted Average Exercise Price |  |  | Number of Stock Options |
$4.88 | – | $5.54 |  | $ | 4.91 |  |  |  | 215,889 |  |  |  | 1.8 |  |  | $ | 4.91 |  |  |  | 208,311 |
$6.91 | – | $6.91 |  | $ | 6.91 |  |  |  | 38,000 |  |  |  | 3.5 |  |  | $ | 6.91 |  |  |  | 22,000 |
$11.69 | – | $11.85 |  | $ | 11.84 |  |  |  | 215,000 |  |  |  | 5.4 |  |  | $ | 11.84 |  |  |  | 62,500 |
|  | $ | 8.25 |  |  |  | 468,889 |  |  |  | 3.5 |  |  | $ | 6.54 |  |  |  | 292,811 |
Schedule of Nonvested Share Activity [Table Text Block] |
|  | Number of Stock Options Outstanding |  |  | Weighted- Average Grant-Date Fair Value per Share |
Balance at January 31, 2014 |  |  | 164,145 |  |  | $ | 2.21 |
Granted |  |  | 40,000 |  |  | $ | 3.43 |
Vested |  |  | (73,840 | ) |  | $ | 1.97 |
Forfeited |  |  | (6,451 | ) |  | $ | 1.96 |
Balance at January 31, 2015 |  |  | 123,854 |  |  | $ | 2.56 |
Vested |  |  | (70,276 | ) |  | $ | 1.92 |
Balance at January 31, 2016 |  |  | 53,578 |  |  | $ | 2.52 |
Share-based Compensation, Performance Shares Award Outstanding Activity [Table Text Block] |
|  | Number of PSUs Outstanding |  |  | Weighted- Average Granted Date Fair Value |  |  | Weighted- Average Remaining Contractual Life (years) |  |  | Aggregate Intrinsic Value (in millions) |
Balance at January 31, 2014 |  |  | 211,428 |  |  | $ | 11.69 |  |  |  |  |  |  |  |  |
Granted |  |  | 51,752 |  |  | $ | 16.67 |  |  |  |  |  |  |  |  |
Exercised |  |  | (83,984 | ) |  | $ | 10.88 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (4,938 | ) |  | $ | 10.93 |  |  |  |  |  |  |  |  |
Balance at January 31, 2015 |  |  | 174,258 |  |  | $ | 12.61 |  |  |  | 7.9 |  |  |  | 3.0 |
Granted |  |  | 49,187 |  |  | $ | 19.70 |  |  |  |  |  |  |  |  |
Performance units issued |  |  | 30,092 |  |  | $ | 9.34 |  |  |  |  |  |  |  |  |
Balance at January 31, 2016 |  |  | 253,537 |  |  | $ | 12.39 |  |  |  | 7.2 |  |  |  | 4.9 |
Vested or expected to vest at January 31, 2016 |  |  | 253,537 |  |  | $ | 12.39 |  |  |  | 7.2 |  |  |  | 4.9 |
Exercisable at January 31, 2016 |  |  | 152,598 |  |  | $ | 9.36 |  |  |  | 6.3 |  |  |  | 2.9 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
|  | Number of RSUs Outstanding |  |  | Weighted- Average Granted Date Fair Value |  |  | Weighted- Average Remaining Contractual Life (years) |  |  | Aggregate Intrinsic Value (in millions) |
Balance at January 31, 2014 |  |  | 214,076 |  |  | $ | 8.96 |  |  |  |  |  |  |  |  |
Granted |  |  | 51,752 |  |  | $ | 13.79 |  |  |  |  |  |  |  |  |
Exercised |  |  | (85,298 | ) |  | $ | 8.36 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (4,938 | ) |  | $ | 8.59 |  |  |  |  |  |  |  |  |
Balance at January 31, 2015 |  |  | 175,592 |  |  | $ | 9.94 |  |  |  | 7.9 |  |  |  | 3.1 |
Granted |  |  | 49,187 |  |  | $ | 15.33 |  |  |  |  |  |  |  |  |
Balance at January 31, 2016 |  |  | 224,779 |  |  | $ | 10.03 |  |  |  | 7.4 |  |  |  | 4.3 |
Vested or expected to vest at January 31, 2016 |  |  | 224,779 |  |  | $ | 10.03 |  |  |  | 7.4 |  |  |  | 4.3 |
Exercisable at January 31, 2016 |  |  | 174,737 |  |  | $ | 8.86 |  |  |  | 7.0 |  |  |  | 3.4 |
Schedule Of Cash Settled Restricted Share Unit Plan Activity [Table Text Block] |
|  | Number of CRSUs Outstanding |  |  | Weighted- Average Remaining Contractual Life (years) |
Balance at January 31, 2014 |  |  | 152,794 |  |  |  |  |
Granted |  |  | 68,439 |  |  |  |  |
Vested and settled in cash |  |  | (106,910 | ) |  |  |  |
Forfeited |  |  | (467 | ) |  |  |  |
Balance at January 31, 2015 |  |  | 113,856 |  |  |  | 1.5 |
Granted |  |  | 72,817 |  |  |  |  |
Vested and settled in cash |  |  | (85,924 | ) |  |  |  |
Balance at January 31, 2016 |  |  | 100,749 |  |  |  | 1.6 |
Non-vested at January 31, 2016 |  |  | 100,749 |  |  |  | 1.6 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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