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Marketable Securities (Tables)
6 Months Ended
Jun. 30, 2021
Marketable Securities [Abstract]  
Marketable Securities
Marketable securities as of June 30, 2021 and December 31, 2020 consisted of the following:
June 30, 2021Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Money market mutual funds$25,145 $— $— $25,145 
Total marketable securities designated as available-for-sale$25,145 $— $— $25,145 
 
December 31, 2020Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Money market mutual funds$20,142 $— $— $20,142 
United States treasuries4,999 — — 4,999 
Total marketable securities designated as available-for-sale$25,141 $— $— $25,141