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Fair Value of Financial Instruments (Tables)
 12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Financial assets and liabilities measured at fair value

The following is a listing of Solitario’s financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within the hierarchy as of December 31, 2020:

 

(in thousands)   Level 1     Level 2     Level 3     Total  
Assets                        
  Short-term investments   $ 5,798     $ -     $ -     $ 5,798  
  Marketable equity securities   $ 1,620     $ -     $ -     $ 1,620  
  Vendetta Warrants   $ -     $ 49     $ -     $ 49  

 

The following is a listing of Solitario’s financial assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within the hierarchy as of December 31, 2019:

 

(in thousands)   Level 1     Level 2     Level 3     Total  
Assets                        
  Short-term investments   $ 6,829     $ -     $ -     $ 6,829  
  Marketable equity securities   $ 1,039     $ -     $ -     $ 1,039  
  Vendetta Warrants   $ -     $ 21     $ -     $ 21