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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net income (loss) | $ 10,630 | $ (9,795)
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |
Interest on liability for sale of future royalties | 4,248 |
Stock-based compensation | 3,885 | 3,655
Depreciation and amortization | 1,361 | 1,058
Loss on estimated returns of acquired product | 1,169 |
Write-off of inventory | 1,029 | 2,416
Amortization of debt discount and issuance costs | 501 | 469
Amortization of right-of-use assets | 328 | 338
Other, net | 49 | 61
(Gain) loss on foreign currency transaction | (1,399) | 954
Net accretion of investments | (984) |
Changes in operating assets and liabilities: |  |
Accounts receivable, net | (5,456) | (2,913)
Inventory | 1,074 | (2,641)
Prepaid expenses and other current assets | (3,274) | 2,426
Other assets | (314) |
Accounts payable | (2,431) | 2,837
Accrued expenses and other current liabilities | 670 | (3,562)
Deferred revenue | (3,537) | 8,558
Recognized loss on purchase commitments | (669) | (2,074)
Operating lease liabilities | (232) | (686)
Net cash provided by operating activities | 6,703 | 1,156
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Proceeds from held-to-maturity debt securities | 21,974 | 22,103
Purchase of held-to-maturity debt securities | (68,399) |
Purchase of property and equipment | (2,408) | (8,311)
Proceeds from insurance claim | 396 |
Net cash (used in) provided by investing activities | (48,437) | 13,792
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from market price stock purchase plan | 1,361 |
Payments for taxes related to net issuance of common stock associated with restricted stock units and stock options | 266 | 52
Principal payment on financing liability | (101) | (72)
Principal payment on MidCap credit facility | (5,000) |
Net cash (used in) provided by financing activities | (3,474) | 1,154
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS | (45,208) | 16,102
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD | 238,480 | 69,767
CASH AND CASH EQUIVALENTS, END OF PERIOD | 193,272 | 85,869
SUPPLEMENTAL CASH FLOWS DISCLOSURES: |  |
Interest paid in cash | 5,931 | 3,700
NON-CASH INVESTING AND FINANCING ACTIVITIES: |  |
Reclassification of Midcap credit facility from long-term to current | 5,000 | 11,667
Reclassification of investments from long-term to current | 4,653 | 1,468
Non-cash construction in progress, property and equipment | 1,667 | 2,438
Reclassification of Thirona convertible notes and interest receivable from current to long-term |  | 7,726
Right-of-use asset modification |  | 728
Goodwill adjustment for a net reduction in liabilities |  | 430
The Mann Group L L C |  |
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |
Interest on Mann Group convertible note | $ 55 | 55
At The Market Issuance |  |
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from at-the-market offering |  | 1,198
Issuance costs associated with at-the-market offering |  | $ (24)

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