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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