Stock-based Compensation Expense - Summary of Stock Based Compensation Expense Recognized (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
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Apr. 30, 2019 |
Apr. 30, 2018 |
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| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
| Stock-based compensation expense | $ (434) | $ 879 |
| Cost of Revenue [Member] | ||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
| Stock-based compensation expense | (3) | 1 |
| Research and Development [Member] | ||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
| Stock-based compensation expense | 68 | 53 |
| Sales and Marketing [Member] | ||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
| Stock-based compensation expense | (86) | 114 |
| General and Administrative [Member] | ||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||
| Stock-based compensation expense | $ (413) | $ 711 |
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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