CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 178,357	$ 193,513
Accounts receivable	14,139	14,454
Receivables from collaboration arrangement	61,871	69,621
Inventory	37,437	40,737
Prepaid expenses	16,551	21,630
Other current assets	2,987	4,264
Total current assets	311,342	344,219
Property and equipment, net	324	483
Equity method investments	151,888	116,546
Equity and long-term investments	476,549	444,432
Capitalized fees paid, net	80,328	83,784
Right-of-use assets	2,269	2,536
Goodwill	17,905	17,905
Intangible assets	223,895	230,335
Other assets	3,112	3,267
Total assets	1,267,612	1,243,507
Current liabilities:
Accounts payable	890	6,717
Accrued personnel-related expenses	3,422	7,020
Accrued interest payable	833	3,422
Deferred revenue	987	1,277
Other accrued liabilities	23,747	19,698
Total current liabilities	29,879	38,134
Long-term debt, net of discount and issuance costs	446,759	446,234
Other long-term liabilities	71,686	71,870
Deferred tax liabilities, net	3,807	563
Income tax payable, long-term	11,800	11,751
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock: $0.01 par value, 230 shares authorized, no shares issued and outstanding	0	0
Common stock: $0.01 par value, 200,000 shares authorized, 62,797 and 63,307 issued and outstanding as of March 31, 2024 and December 31, 2023, respectively	628	633
Treasury stock: at cost, 32,005 shares as of March 31, 2024 and December 31, 2023	(393,829)	(393,829)
Additional paid-in capital	1,085,539	1,093,340
Retained earnings (accumulated deficit)	11,343	(25,189)
Total stockholders' equity	703,681	674,955
Total liabilities and stockholders' equity	$ 1,267,612	$ 1,243,507