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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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STOCKHOLDERS? EQUITY - Equity Incentive Plan (Details) - 2016 Equity Incentive Plan - shares	1 Months Ended		9 Months Ended	12 Months Ended
	Aug. 31, 2018	Mar. 31, 2017	Oct. 31, 2019	Jan. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award
Additional shares authorized	2,000,000	800,000
Number of shares reserved for issuance	2,960,000	960,000
Options
Share-based Compensation Arrangement by Share-based Payment Award
Expiration period			10 years	10 years
Minimum \| Options
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period			1 year	1 year
Maximum \| Options
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period			4 years	4 years