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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Cash flows from operating activities |  |  |
Net income | $ 23,392 | $ 179,722 | $ 220,262
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Deferred income taxes | (12,617) | 4,400 | 25,006
Amortization of capitalized fees and depreciation of property and equipment | 13,951 | 13,921 | 13,931
Amortization of acquired intangible assets | 25,902 | 21,784 | 5,581
Inventory fair value step-up adjustment included in cost of products sold | 13,820 | 27,164 | 10,023
Stock-based compensation | 6,374 | 5,837 | 7,347
Amortization of debt discount and issuance costs | 2,110 | 2,065 | 2,055
Changes in fair values of equity method investments, net | 64,253 | (77,392) | 161,749
Changes in fair values of equity and long-term investments, net | 59,161 | (11,129) | (8,462)
Loss on extinguishment of debt | 0 | 0 | 20,662
Net gain on sale of TRC | 0 | 0 | (266,696)
Other non-cash items | (722) | (517) | 3,402
Changes in operating assets and liabilities: |  |  |
Accounts receivable | (5,938) | (5,053) | (3,525)
Receivables from collaboration arrangements | 3,647 | (14,949) | 13,319
Inventory | (6,808) | (12,004) | 280
Prepaid expenses | 567 | 7,929 | (21,350)
Other assets | (38,186) | (2,965) | (3,341)
Accounts payable | (4,585) | 3,778 | 92
Accrued personnel-related expenses and other accrued liabilities | 3,044 | (1,498) | 11,913
Accrued interest payable | 0 | (937) | 207
Deferred revenue | (151) | (817) | (755)
Income tax payable | 41,476 | 1,725 | 10,026
Net cash provided by operating activities | 188,690 | 141,064 | 201,726
Cash flows from investing activities |  |  |
Acquisition of intangible asset | (4,000) | 0 | 0
Purchases of equity method investments | 0 | 0 | (45,000)
Purchases of trading securities | (59,617) | (65,132) | 0
Purchases of equity and long-term investments | 0 | (1,218) | (13,725)
Purchases of equity investments managed by ISP Fund LP | (32,270) | (31,164) | (60,910)
Purchases of trading security managed by ISP Fund LP | 0 | 0 | (50,000)
Sales of equity investments managed by ISP Fund LP | 75,756 | 72,500 | 24,281
Purchases and sales of other investments managed by ISP Fund LP, net | (43,486) | (41,336) | (23,371)
Purchases of property and equipment | (270) | (411) | (67)
Sale of property and equipment | 101 | 0 | 0
Proceeds from sale of ownership interest in TRC, net | 0 | 0 | 248,191
Cash acquired through the consolidation of Entasis | 0 | 0 | 23,070
Cash paid for the acquisition of La Jolla, net of cash acquired | 0 | 0 | (159,103)
Net cash used in investing activities | (63,786) | (66,761) | (56,634)
Cash flows from financing activities |  |  |
Distributions to noncontrolling interests | 0 | 0 | (69,811)
Purchase of Entasis noncontrolling interest | 0 | 0 | (43,910)
Repurchase of common stock | (14,777) | (75,728) | (8,503)
Repurchase of shares to satisfy tax withholding | (142) | (77) | (82)
Proceeds from issuances of common stock, net | 1,466 | 170 | 370
Payment for repurchase of convertible subordinated notes due 2023 | 0 | (96,204) | (165,131)
Purchases of capped call options associated with convertible senior notes due 2028 | 0 | 0 | (21,037)
Proceeds from issuance of convertible senior notes due 2028, net of issuance costs | 0 | 0 | 252,536
Net cash used in financing activities | (13,453) | (171,839) | (55,568)
Net increase (decrease) in cash and cash equivalents | 111,451 | (97,536) | 89,524
Cash and cash equivalents at beginning of period | 193,513 | 291,049 | 201,525
Cash and cash equivalents at end of period | 304,964 | 193,513 | 291,049
Supplemental Disclosure of Cash Flow Information: |  |  |
Cash paid for interest | 10,359 | 11,381 | 11,736
Cash paid for income taxes | 11,793 | 0 | 53,855
Supplemental Disclosure of Non-cash Investing and Financing Activities: |  |  |
Accrued interest income converted to long-term investments | 3,584 | 2,666 | 0
Adoption of ASU 2020-06 | $ 0 | $ 0 | $ (28,228)

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