FAIR VALUE MEASUREMENTS (Details) - USD ($)	Apr. 30, 2020	Jan. 31, 2020
FAIR VALUE MEASUREMENTS
Common stock liability	$ 0	$ 383,000
Level 1
FAIR VALUE MEASUREMENTS
Common stock liability	$ 0	$ 400,000

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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