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5. INVESTMENTS (Tables) | 6 Months Ended
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Jun. 30, 2020
Schedule of Investments [Abstract] |
Schedule of gain (loss) on investments |
Schedule of gain (loss) on investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
|  | (In thousands) |
Change in fair value of investment, warrants |  | $ | 2,677 |  |  | $ | 3,091 |  |  | $ | 3,306 |  |  | $ | 2,394 |
Change in fair value of investment, common stock |  |  | – |  |  |  | 3,889 |  |  |  | 3,479 |  |  |  | 11,494 |
Gain on sale of investment, warrants |  |  | 554 |  |  |  | – |  |  |  | 554 |  |  |  | – |
Loss on sale of investment, common stock |  |  | – |  |  |  | (1,642 | ) |  |  | (3,316 | ) |  |  | (7,232 | )
Net realized and unrealized gain (loss) on investment at fair value |  | $ | 3,231 |  |  | $ | 5,338 |  |  | $ | 4,023 |  |  | $ | 6,656 |

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