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The following table summarizes the changes in the Company’s investments in Alzamend common stock during the three months ended March 31, 2022: (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Restructuring Cost and Reserve [Line Items] |  |
Unrealized loss in common stock of Alzamend |  | $ 1,960,000
Investment in Alzamend common stock (in shares) | 7,100,000 |
Alzamend [Member] | Common Stock [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Investment in common stock ,beginning (in shares) | 6,947,000 |
Investment in common stock (in dollar per share) | $ 1.90 |
Investment in common stock,beginning | $ 13,230,000 |
Open market purchases after initial public offering (in shares) | 153,000 |
Open market purchases after initial public offering (in dollar per share) | $ 1.27 |
Open market purchases after initial public offering | $ 194,000 |
Unrealized loss in common stock of Alzamend | $ (4,691,000) |
Investment in Alzamend common stock (in dollar per share) | $ 1.23 |
Investment in Alzamend common stock | $ 8,733,000 |
Investment in Alzamend options | (4,000) |
Investment in common stock, ending | $ 8,729,000 |

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