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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Cash flows from operating activities: |  |
Net loss including noncontrolling interests in subsidiaries | $ (6,570) | $ (92,360)
Adjustments to reconcile net loss including noncontrolling interests in subsidiaries to net cash used in operating activities: |  |
Depreciation and amortization | 10,152 | 10,140
Amortization of debt discount and issuance costs | 0 | 90
Change in fair value of Series A redeemable convertible preferred stock embedded derivatives | (3,954) | 3,941
Change in fair value of Series A warrants | 0 | (1,895)
Change in fair value of Series B warrants | (2,762) | (36,636)
Compensation expense for share-based awards | 2,324 | 3,288
(Gain) loss on foreign currency exchange | (25) | 4,530
Change in fair value of equity securities | (18,783) | 266,202
Gain (loss) on sale of equity securities | 9,360 | (114,434)
Earnings on equity investment in joint venture | (3,375) | (42,935)
Deferred income taxes | (1,063) | (15,971)
Changes in assets and liabilities: |  |
Accounts receivable | 2,982 | 2,242
Inventories | 1,847 | (4,872)
Prepaid expenses and other assets | (1,395) | (1,078)
Accounts payable and accrued expenses | (5,623) | 4,984
Royalties and contingent legal fees payable | 597 | 795
Deferred revenue | (149) | 371
Net cash used in operating activities | (17,962) | (13,598)
Cash flows from investing activities: |  |
Patent acquisition | 0 | (5,000)
Purchases of equity securities | (8,678) | (107,537)
Sales of equity securities | 15,198 | 236,164
Distributions received from equity investment in joint venture | 2,249 | 1,178
Purchases of property and equipment | (152) | (552)
Net cash provided by investing activities | 8,617 | 124,253
Cash flows from financing activities: |  |
Repurchase of common stock | 0 | (50,988)
Paydown of Senior Secured Notes | (60,000) | (120,000)
Dividend on Series A Redeemable Convertible Preferred Stock | (1,400) | (2,099)
Taxes paid related to net share settlement of share-based awards | (595) | (1,520)
Proceeds from exercise of stock options | 235 | 0
Net cash provided by (used in) financing activities | 66,351 | (174,607)
Effect of exchange rates on cash and cash equivalents | (59) | (3,535)
Increase (decrease) in cash and cash equivalents | 56,947 | (67,487)
Cash and cash equivalents, beginning | 287,786 | 309,361
Cash and cash equivalents, ending | 344,733 | 241,874
Supplemental schedule of cash flow information: |  |
Interest paid | 2,380 | 5,431
Income taxes paid | 722 | 209
Noncash investing and financing activities: |  |
Distribution to noncontrolling interests in subsidiaries | 1,126 | 586
Gain On Warrant Exercises | (1,525) | 0
Series B |  |
Cash flows from financing activities: |  |
Proceeds from Warrant Exercises | 49,000 | 0
Rights Offering |  |
Cash flows from financing activities: |  |
Proceeds from Warrant Exercises | $ 79,111 | $ 0

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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
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- Definition Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
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