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Stock Option Plans (Tables) | 12 Months Ended
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Jan. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Fair Value Option Award | The assumptions for the periods indicated are noted in the following table. Weighted average Black-Scholes-Merton fair value assumptions
| Years Ending January 31,
| 2018 |  | 2017 |  | 2016
Risk free interest rate | 1.89 - 2.01% |  | — |  | 1.34 - 1.55%
Expected life | 4.87 - 6.87 yrs |  | — |  | 4.87 - 6.87 yrs
Expected volatility | 42 - 47% |  | — |  | 50 - 52%
Expected dividend yield | 0.0% |  | — |  | 0.0%
Summary of Company's Stock Option Activity | The following table presents a summary of the Company’s stock option activity for the fiscal year ended January 31, 2018:
| Number of Shares (in thousands) |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value (in thousands)
Outstanding, January 31, 2017 | 1,781 |  |  | $ | 9.27 |  |  | 5.90 |  | $ | 778 |
Granted | 549 |  |  | 4.66 |  |  |  |  |
Exercised | — |  |  | — |  |  |  |  |
Forfeited | (94 | ) |  | 11.24 |  |  |  |  |
Expired | (64 | ) |  | 17.70 |  |  |  |  |
Outstanding, January 31, 2018 | 2,172 |  |  | $ | 7.75 |  |  | 6.16 |  | $ | 320 |
Exercisable at January 31, 2018 | 1,400 |  |  | $ | 9.51 |  |  | 4.84 |  | $ | 214 |
Vested and expected to vest at January 31, 2018 | 2,149 |  |  | $ | 7.53 |  |  | 6.01 |  | $ | 318 |
Restricted Stock and Changes During Period | Restricted stock as of January 31, 2018 and changes during the fiscal year ended January 31, 2018 were as follows:
| Year Ended January 31, 2018
| Number of Shares (in thousands) |  | Weighted Average Grant Date Fair Value
Unvested, beginning of period | 12 |  |  | $ | 11.89 |
Granted | — |  |  | — |
Vested | (10 | ) |  | 13.03 |
Canceled | — |  |  | — |
Unvested, end of period | 2 |  |  | $ | 9.97 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (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=96867065&loc=d3e5070-113901 + Details
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