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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities: |  |  |
Net Income (Loss) | $ 41,577 | $ 185,959 | $ 128,291
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Inventory step-up charges | 1,238 | 0 | 2,130
Depreciation and amortization | 68,085 | 50,985 | 38,447
Amortization of debt discount and issuance costs | 2,448 | 1,815 | 11,530
Stock-based compensation | 25,575 | 27,316 | 27,500
Deferred income taxes, net | 2,317 | (1,352) | 6,517
Contingent consideration | (30,569) | (28,729) | 5,865
Non-cash interest income | (2,023) | 0 | 0
Loss on extinguishment of debt | 12,676 | 0 | 0
Other | 1,231 | (100) | 864
Changes in operating assets and liabilities, excluding impact of acquisitions: |  |  |
Accounts receivable | (3,312) | (3,596) | (46,523)
Inventories | 40,973 | (57,204) | (89,781)
Prepaid expenses and other assets | (13,030) | 2,396 | (10,192)
Operating lease right of use assets | 14,059 | (24,549) | (4,315)
Other assets | (461) | (231) | 430
Accounts payable | (9,803) | (8,197) | 19,523
Accrued expenses | (27,921) | (2,019) | 23,196
Operating lease liability | (9,229) | 28,623 | 6,958
Long-term liabilities | 87 | 966 | (1,424)
Total cash provided by operating activities | 113,918 | 172,083 | 119,016
Cash flows from investing activities: |  |  |
Purchase of marketable securities held to maturity | 0 | (100,000) | 0
Redemption of marketable securities | 102,323 | 0 | 0
Additions to capitalized software costs | (2,766) | (3,512) | (4,187)
Acquisitions, net of cash acquired | (186,642) | 0 | (149,893)
Purchases of property, plant and equipment | (36,222) | (84,834) | (67,089)
Purchase of intellectual property | 0 | (45,000) | 0
Other investing activities | 32 | 110 | 0
Total cash used in investing activities | (123,275) | (233,236) | (221,169)
Cash flows from financing activities: |  |  |
Repurchase of common stock | (14,386) | 0 | 0
Proceeds from issuance of 2023 Convertible Senior Notes | 290,094 | 0 | 0
Proceeds from exercise of stock options | 1,076 | 3,707 | 3,879
Payment of debt issuance costs | (7,253) | 0 | 0
Payment of tax withholding obligation on vesting of restricted stock | (13,227) | (17,018) | (2,897)
Payment of earnout consideration | (7,298) | 0 | 0
Other financing activities | (45) | (26) | (21)
Total cash provided by (used in) financing activities | 248,961 | (13,337) | 961
Effect of exchange rate changes on cash and cash equivalents | (11,739) | (5,866) | (12,286)
Net increase (decrease) in cash and cash equivalents | 227,865 | (80,356) | (113,478)
Cash and cash equivalents, beginning of period | 523,458 | 603,814 | 717,292
Cash and cash equivalents, end of period | 751,323 | 523,458 | 603,814
Supplemental disclosure of cash flow information: |  |  |
Income taxes paid | 26,963 | 34,365 | 16,515
Interest paid | 988 | 1,033 | 1,066
Supplemental disclosure of non-cash investing and financing activities: |  |  |
Assets acquired under operating leases | 4,335 | 29,126 | 85,312
Fair value of shares of common stock issued for acquisitions | 13,569 | 0 | 82,968
Fair value of shares of common stock issued for contingent consideration earnouts | 7,229 | 0 | 0
Acquisition date fair value of contingent consideration earnouts | 6,640 | 0 | 88,373
Issuance of 2023 Notes in exchange of 2019 Notes | 42,179 | 0 | 0
Extinguished 2019 Notes | $ 29,634 | $ 0 | $ 0

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