ACQUISITIONS - Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jul. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Liabilities:
Goodwill		$ 19,856	$ 0
Spectrum Pharmaceuticals, Inc.
Business Acquisition [Line Items]
Consideration transferred	$ 252,873
Assets:
Cash and cash equivalents	34,600
Marketable securities	2,194
Accounts receivable	50,975
Inventories	22,244
Prepaid and other current assets	1,287
Property and equipment	100
Intangible assets	234,000
Other long-term assets	1,396
Total	346,796
Liabilities:
Accounts payable	10,108
Accrued rebates, returns and discounts	21,025
Accrued liabilities	36,509
Other current liabilities	784
Deferred taxes	34,250
Other long-term liabilities	11,103
Total	113,779
Total Spectrum net assets acquired	233,017
Goodwill	$ 19,856