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Fair Value (Details) - USD ($)
Jun. 30, 2022
Dec. 31, 2021
Assets    
Short-term Investments $ 5,870,000 $ 5,087,000
Marketable Equity Securities 940 1,307
Vendetta Warrants 0 3,000
Level 1    
Assets    
Short-term Investments 5,870,000 5,087,000
Marketable Equity Securities 940,000 1,307,000
Vendetta Warrants   0
Level 2    
Assets    
Short-term Investments 0 0
Marketable Equity Securities 0 0
Vendetta Warrants   3,000
Level 3    
Assets    
Short-term Investments 0 0
Marketable Equity Securities $ 0 0
Vendetta Warrants   $ 0