EMPLOYEE BENEFIT PLAN (Details) - USD ($)	12 Months Ended
Jan. 31, 2020	Jan. 31, 2019
EMPLOYEE BENEFIT PLAN
Employee maximum contribution percentage	100.00%
Employer discretionary contribution amount	$ 0	$ 0

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration