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Marketable Securities
3 Months Ended
Mar. 31, 2021
Marketable Securities [Abstract]  
Marketable Securities As of March 31, 2021 and December 31, 2020, short-term investments consisted of certificates of deposit. These securities are classified as current based upon their maturities. As of March 31, 2021 and December 31, 2020 short-term investments amounted to $39,788 and $39,302, respectively, and have maturities of one year or less.