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SHAREHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	9 Months Ended
	Jul. 31, 2023	Mar. 31, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 17, 2021	May 20, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from the issuance of common stock			$ 0	$ 7,020
Unamortized issuance costs			$ 1,898		$ 3,849
Warrants term							18 months
Warrants exercised (in shares)				400,000
Common shares issued (in shares)				400,000
Warrants outstanding				$ 0
Zyla Life Sciences | Iroko | Warrant Agreements
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise aggregate ownership percentage maximum threshold							49.00%
Zyla Life Sciences | Money market funds | Zyla Life Sciences
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price, number of shares outstanding, per share (in dollars per share)							$ 0.0016
Spectrum Pharmaceuticals, Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock (in shares)	38,000,000
At The Market Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate offering price						$ 25,000
Stock offering, shares sold (in shares)			2,463,637
Stock offering, purchase price (in dollars per share)			$ 3.02
Stock offering, gross proceeds			$ 7,400
Stock offering, net proceeds			7,000
Additional Paid-In Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Induced exchange of convertible notes, gross			28,300
Convertible notes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized issuance costs			1,600
6.5% Convertible Senior Secured Notes due 2027 | Convertible notes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from the issuance of common stock		$ 10,500
Induced exchange of convertible notes (in shares)		7,000,000
Unamortized issuance costs			$ 1,600

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