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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Cash flows from operating activities: |  |
Net loss including noncontrolling interests in subsidiaries | $ (144,205) | $ (5,143)
Adjustments to reconcile net loss including noncontrolling interests in subsidiaries to net cash used in operating activities: |  |
Change in fair value of investment, net | 0 | (6,785)
(Gain) loss on sale of investment | (839) | 2,762
Depreciation and amortization | 4,547 | 2,404
Amortization of debt discount and issuance costs | 128 | 270
Change in fair value of Series A redeemable convertible preferred stock embedded derivative | 14,463 | 11,539
Change in fair value of Series A warrants | 11,824 | 3,384
Change in fair value of Series B warrants | 178,198 | 52,361
Non-cash stock compensation | 979 | 755
Loss on foreign currency exchange | 176 | 4,890
Change in fair value of equity securities | (49,007) | (78,961)
(Gain) loss on sale of equity securities | (15,436) | 7,009
Earnings on equity investment in joint venture, net of distributions received | (907) | 0
Changes in assets and liabilities: |  |
Accounts receivable | (12,244) | (882)
Prepaid expenses and other assets | (627) | 877
Accounts payable and accrued expenses | 2,826 | (1,588)
Royalties and contingent legal fees payable | 3,927 | (35)
Net cash used in operating activities | (6,197) | (7,143)
Cash flows from investing activities: |  |
Patent acquisition | (11,000) | (13,780)
Sale of investment at fair value | 3,591 | 1,460
Purchases of equity securities | (27,871) | (31,317)
Maturities and sales of equity securities | 33,467 | 299,227
Purchases of prepaid investment | 0 | (282,327)
Equity securities derivative and forward contract acquisition cost | 0 | (3,989)
Purchases of property and equipment | (45) | (148)
Net cash used in investing activities | (1,858) | (30,874)
Cash flows from financing activities: |  |
Repurchase of common stock | 0 | (3,998)
Issuance of Senior Secured Notes, net of lender fee | 30,000 | 110,437
Senior Secured Notes issuance costs paid to other parties | 0 | (496)
Dividend on Series A Redeemable Convertible Preferred Stock | (523) | (653)
Issuance of Series B warrants | 0 | 4,600
Proceeds from exercise of stock options | 94 | 48
Paydown of Senior Secured Notes - short term | (50,000) | 0
Reissuance of Senior Secured Notes - short term | 50,000 | 0
Net cash provided by financing activities | 29,571 | 109,938
Increase in cash and cash equivalents and restricted cash | 21,516 | 71,921
Cash and cash equivalents and restricted cash, beginning | 200,546 | 92,359
Cash and cash equivalents and restricted cash, ending | 222,062 | 164,280
Supplemental schedule of cash flow information: |  |
Interest paid | 2,340 | 0
Income taxes paid | 9 | 164
Noncash investing activities: |  |
Patent acquisition in exchange of notes receivable | 4,000 | 0
Patent acquisition accrued liability - short term | 10,000 | 0
Patent acquisition accrued liability - long term | 5,000 | 0
Acquisition of prepaid investment securities | $ 0 | $ 183,587

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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