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NATURE OF OPERATIONS (Details) $ in Thousands				3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 11, 2021 USD ($)	Aug. 06, 2021 USD ($)	Feb. 12, 2021 shares	Jun. 30, 2021 USD ($) shares	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment shares	Jun. 30, 2020 USD ($)	Dec. 31, 2021 employee	Sep. 30, 2021 USD ($)	Jul. 19, 2021 shares	Feb. 11, 2021 shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($)
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of segments | segment						1
Reverse stock split, conversion ratio (share/share)			0.25
Common stock shares authorized (in shares) | shares			75,000,000	75,000,000		75,000,000						75,000,000
Net loss				$ 19,924	$ 167,440	$ 40,474	$ 207,673
Cash used in operations						(28,808)	(88,070)
Cash and investments				104,000		104,000
Accumulated deficit				(606,670)		(606,670)						$ (566,196)
Pro forma cash, cash equivalents, restricted cash and restricted cash equivalents				104,011	$ 97,366	104,011	$ 97,366					$ 58,418	$ 44,584
Amended And Restated Credit Agreement
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Outstanding debt				$ 35,000		$ 35,000
Employee Severance | Forecast
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of employees expected to be terminated | employee								70
Employee Severance | Minimum | Forecast
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Employee termination costs									$ 1,500
Employee Severance | Maximum | Forecast
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Employee termination costs									$ 2,000
Subsequent Event
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Common stock shares authorized (in shares) | shares										150,000,000
Repayments on outstanding debt	$ 36,500
Prepayment fee, percentage	4.00%
Licensing Agreements | Subsequent Event
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Payments for licensing agreements		$ 1,000
Royalty percent, maximum		10.00%
Topical BETi Option Agreement | Subsequent Event
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Payments for licensing agreements		$ 500
Milestone payments upon achieving certain criteria, maximum		15,750
Oral BETi Option Agreement | Subsequent Event
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Payments for licensing agreements		4,000
Milestone payments upon achieving certain criteria, maximum		$ 43,750
Menlo - Premerger
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Common stock shares authorized (in shares) | shares											300,000,000

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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