CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 144,049	$ 291,049
Accounts receivable , net	15,490	9,401
Receivables from collaboration arrangement	60,314	54,672
Inventory	49,653	55,897
Prepaid expenses	24,119	29,559
Other current assets	2,821	2,933
Total current assets	296,446	443,511
Property and equipment, net	180	170
Equity Method Investment	54,971	39,154
Equity and long-term investments	400,894	363,859
Capitalized fees paid, net	94,151	97,607
Right-of-use assets	2,973	3,265
Goodwill	27,946	26,713
Intangible assets	248,314	252,919
Other assets	3,893	4,299
Total assets	1,129,768	1,231,497
Current liabilities:
Accounts payable	5,933	2,939
Accrued personnel-related expenses	4,223	8,022
Accrued interest payable	833	4,359
Deferred revenue	2,094	2,094
Convertible subordinated notes due 2023, net of issuance costs	0	96,193
Income tax payable	154	154
Other accrued liabilities	24,900	21,207
Total current liabilities	38,137	134,968
Long-term debt, net of discount and issuance costs	444,692	444,180
Other long-term liabilities	70,133	70,918
Deferred tax liabilities, net	5,392	5,771
Income tax payable, long-term	9,921	9,872
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, 65,824 and 69,188 issued and outstanding as of March 31, 2023 and December 31, 2022, respectively	659	692
Treasury stock: at cost, 32,005 shares as of March 31, 2023 and December 31, 2022, respectively	(393,829)	(393,829)
Additional paid-in capital	1,124,709	1,163,836
Accumulated deficit	(170,046)	(204,911)
Total stockholders' equity	561,493	565,788
Total liabilities and stockholders' equity	$ 1,129,768	$ 1,231,497