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v3.19.1

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities: |  |
Net income (loss) including noncontrolling interests in operating subsidiaries | $ (104,848) | $ 21,684
Adjustments to reconcile net income (loss) including noncontrolling interests in operating subsidiaries to net cash provided by (used in) operating activities: |  |
Gain on Conversion of Loan and Accrued Interest | 0 | (2,671)
Gain on exercise of Primary Warrant | 0 | (4,616)
Change in fair value of investment | 59,103 | (42,239)
Loss on Sale of Investments | 19,095 | 0
Depreciation and amortization | 27,145 | 22,243
Non-cash stock compensation | (317) | 8,885
Impairment of Patent-Related Intangible Assets | 28,210 | 2,248
Other | 564 | (374)
Changes in assets and liabilities: |  |
Accounts receivable | (28,189) | 26,597
Prepaid expenses and other assets | (208) | (135)
Accounts payable and accrued expenses / costs | 963 | (6,349)
Royalties and contingent legal fees payable | 19,359 | (12,307)
Net cash provided by (used in) operating activities | 20,877 | 12,966
Cash flows from investing activities: |  |
Payments to Acquire Other Investments | (7,000) | (31,514)
Proceeds from Sale of Other Assets, Investing Activities | 19,097 | 0
Payments to Acquire Notes Receivable | 0 | (4,000)
Purchase of property and equipment | (34) | (2)
Purchase of available-for-sale investments | (102,769) | (448,388)
Sale of available-for-sale investments | 66,640 | 467,790
Net cash provided by (used in) investing activities | (24,066) | (16,114)
Cash flows from financing activities: |  |
Proceeds from the exercise of stock options | 257 | 745
Repurchase of restricted common stock | (229) | (45)
Repurchases of common stock | (4,634) | 0
Net cash provided by (used in) financing activities | (4,606) | 700
Increase in cash and cash equivalents | (7,795) | (2,448)
Cash and cash equivalents, beginning | 136,604 | 139,052
Cash and cash equivalents, ending | $ 128,809 | $ 136,604

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