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Stock-Based Compensation | 3 Months Ended
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Apr. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock-Based Compensation | Note 8: Stock-Based Compensation Total stock-based compensation recognized for stock-based awards in the condensed consolidated statements of operations was as follows (in thousands):
|  | Three Months Ended |
|  | April 30, 2019 |  |  | April 30, 2018 |
Cost of revenue |  | $ | 285 |  |  | $ | 192 |
Sales and marketing |  |  | 446 |  |  |  | 326 |
Research and development |  |  | 1,096 |  |  |  | 863 |
General and administrative |  |  | 1,155 |  |  |  | 933 |
Total stock-based compensation expense |  | $ | 2,982 |  |  | $ | 2,314 |
As of April 30, 2019, there was $31.2 million of unrecognized stock-based compensation expense related to unvested RSUs, stock options and ESPP purchases that will be recognized on a straight-line basis over the remaining weighted-average vesting period of approximately 3 years. The fair value of employee stock options and ESPP purchases was estimated using the Black–Scholes model with the following assumptions:
|  | Three Months Ended |
|  | April 30, 2019 |  |  | April 30, 2018 |
Stock Options: |  |  |  |  |  |  |  |
Expected volatility |  | 44% |  |  | 43% |
Expected term (in years) |  | 6.1 |  |  | 6.1 |
Risk-free interest rate |  | 2.5% |  |  | 2.7% |
Dividend yield |  | NA |  |  | NA |
|  | Three Months Ended |
|  | April 30, 2019 |  |  | April 30, 2018 |
ESPP: |  |  |  |  |  |  |  |
Expected volatility |  | 40%-49% |  |  | 47%-56% |
Expected term (in years) |  | 0.5-2.0 |  |  | 0.5-2.0 |
Risk-free interest rate |  | 2.4%-2.5% |  |  | 2.0%-2.3% |
Dividend yield |  | NA |  |  | NA |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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