STOCK-BASED COMPENSATION - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 31, 2020	Jan. 31, 2019
Share-based Compensation
Stock-based compensation expense	$ 741	$ 2,061
Total compensation costs not yet recognized	$ 800
Average remaining amortization period for recognition of expense	2 years 3 months 15 days
Research and development
Share-based Compensation
Stock-based compensation expense	$ 238	654
Sales and marketing
Share-based Compensation
Stock-based compensation expense	57	414
General and administrative
Share-based Compensation
Stock-based compensation expense	$ 446	$ 993

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.

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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.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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