XML 61 R42.htm IDEA: XBRL DOCUMENT v3.20.4
Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2020
Fair Value Disclosures [Abstract]  
Schedule of fair value of financial instruments by level in hierarchy The following table summarizes the fair value of these marketable securities by level within the fair value hierarchy:
December 31, 2020December 31, 2019
Level 1Level 2TotalLevel 1Level 2Total
Commercial Paper— — — — $2,119,607 $2,119,607 
Total fair value of marketable securities$— $— $— $— $2,119,607 $2,119,607