SUBSEQUENT EVENT (Details) - USD ($) $ in Thousands			1 Months Ended	10 Months Ended	15 Months Ended
	Jun. 28, 2019	Oct. 09, 2015	Oct. 31, 2020	Apr. 30, 2020	Jul. 31, 2021
SUBSEQUENT EVENT
Proceeds from License Fees Received		$ 5,000
Abuse Deterrent Pharma, LLC
SUBSEQUENT EVENT
Proceeds from License Fees Received				$ 350
AD Pharma Agreement | Abuse Deterrent Pharma, LLC
SUBSEQUENT EVENT
Proceeds from License Fees Received	$ 350			$ 200
Subsequent event | AD Pharma Agreement
SUBSEQUENT EVENT
Proceeds from License Fees Received			$ 200
Subsequent event | AD Pharma Agreement | Maximum
SUBSEQUENT EVENT
Proceeds from License Fees Received			$ 350
Subsequent event | AD Pharma Agreement | Abuse Deterrent Pharma, LLC
SUBSEQUENT EVENT
Proceeds from License Fees Received					$ 200