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v3.20.1

Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Cash flows from operating activities: |  |
Net loss including noncontrolling interests in subsidiaries | $ (17,129,000) | $ (104,848,000)
Adjustments to reconcile net loss including noncontrolling interests in subsidiaries to net cash provided by (used in) operating activities: |  |
Change in fair value of investment, net (Note 6) | (9,899,000) | 59,103,000
Loss on sale of investment (Note 6) | 9,230,000 | 19,095,000
Impairment of other investment (note 6) | 8,195,000 | 1,000,000
Gain on disposal of other investment (Note 6) | (2,000,000) | 0
Depreciation and amortization | 3,227,000 | 27,145,000
Change in fair value of Series A redeemable convertible preferred stock embedded derivative | (3,258,000) | 0
Change in fair value of Series A warrant | (1,260,000) | 0
Non-cash stock compensation | 1,075,000 | (317,000)
Change in value of trading securities | (2,241,000) | 0
Impairment of patent-related intangible assets | 0 | 28,210,000
Other | 0 | (436,000)
Changes in assets and liabilities: |  |
Accounts receivable | 32,373,000 | (28,189,000)
Prepaid expenses and other assets | (220,000) | (208,000)
Accounts payable and accrued expenses | 109,000 | 963,000
Royalties and contingent legal fees payable | (20,510,000) | 19,359,000
Net cash provided by (used in) operating activities | (2,308,000) | 20,877,000
Cash flows from investing activities: |  |
Patent acquisition costs | (4,420,000) | 0
Sale of investment at fair value (Note 6) | 6,628,000 | 19,097,000
(Purchase) Sale of other Investments (Note 6) | 2,000,000 | (7,000,000)
Purchases of trading securities | (147,178,000) | (102,769,000)
Maturities and sales of trading securities | 75,090,000 | 66,640,000
Purchases of property and equipment | (183,000) | (34,000)
Net cash provided by (used in) investing activities | (68,063,000) | (24,066,000)
Cash flows from financing activities: |  |
Repurchase of common stock | 0 | (4,634,000)
Repurchase of restricted common stock | 0 | (229,000)
Issuance of redeemable convertible preferred stock and Series A warrants, net of issuance costs | 33,842,000 | 0
Proceeds from exercise of stock options | 79,000 | 257,000
Net cash provided by (used in) financing activities | 33,921,000 | (4,606,000)
Decrease in cash and cash equivalents and restricted cash | (36,450,000) | (7,795,000)
Cash and cash equivalents and restricted cash, beginning | 128,809,000 | 136,604,000
Cash and cash equivalents and restricted cash, ending | $ 92,359,000 | $ 128,809,000

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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for 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 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
Name: | us-gaap_UnrealizedGainLossOnInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration