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v3.21.2

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Cash flows from operating activities: |  |
Net income | $ 29,040 | $ 25,196
Adjustments to reconcile net income to net cash from operating activities: |  |
Provision for credit losses on accounts receivable | 150 | 965
Reserve for product returns | 1,129 | 1,000
Recovery of credit losses on notes receivable | (11) | (382)
Amortization on patents and tooling | 603 | 401
Amortization and depreciation | 14,862 | 13,145
Amortization of debt discount and debt issuance costs | 7,399 | 54
Amortization of operating leases | 4,695 | 4,234
Deferred income taxes | (7,143) | (2,526)
Change in fair value of contingent liability | 0 | (2,289)
Stock-based compensation | 17,944 | 13,453
Acquired in-process research and development | 0 | 3,297
Loss on early extinguishment of debt | 185 | 0
Changes in operating assets and liabilities: |  |
Accounts receivable | (10,565) | (2,549)
Inventory | (15,330) | (16,238)
Other current and non-current assets | (8,131) | (3,270)
Accounts payable, accrued expenses and other current liabilities | 13,403 | 17,332
Deferred revenue | 2,490 | 1,039
Operating lease liabilities | (5,677) | (4,728)
Other liabilities | 265 | (86)
Cash flows from operating activities | 45,308 | 48,048
Cash flows used in investing activities: |  |
Additions to property and equipment | (7,381) | (7,116)
Purchases of in-process research and development | 0 | (3,297)
Receipt of payments on notes receivable | 5 | 2,007
Purchase of investment in unconsolidated entity | (5,000) | 0
Purchases of patents and patent licenses | 0 | (900)
Cash flows used in investing activities | (12,376) | (9,306)
Cash flows from financing activities: |  |
Proceeds from credit facility | 0 | 50,000
Repayments of credit facility | (110,000) | (1,000)
Proceeds from issuance of convertible senior notes | 500,000 | 0
Payments of debt issuance costs | (15,698) | 0
Payments of deferred consideration for business acquisitions | (878) | (819)
Purchases of treasury stock | 0 | (5,149)
Issuances of common stock from equity-based plans | 2,867 | 4,424
Cash flows from financing activities | 376,291 | 47,456
Net increase in cash and cash equivalents | 409,223 | 86,198
Cash and cash equivalents at beginning of the period | 253,459 | 119,629
Cash and cash equivalents at end of the period | $ 662,682 | $ 205,827

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