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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2022
Fair Value Disclosures [Abstract]  
Fair Value, by Balance Sheet Grouping The cost, gross unrealized gains (losses) and fair value of marketable securities by major security type as of March 31, 2022 were as follows:
CostUnrealized Gain (Loss)Fair Value
Marketable securities
Debt securities$908,059 $(44,419)$863,640 
Equity securities2,645,869 (268,570)2,377,299 
Total marketable securities3,240,939