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Short-term Investments
 3 Months Ended
Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Short-term Investments Short-term Investments
As of March 31, 2023, the Company's short-term investments consisted of U.S. Treasury Securities classified as held-to-maturity. Held-to-maturity investments are recorded at amortized cost and adjusted for the amortization or accretion of premiums or discounts. The Company considers all investments with original maturities of 3 months or less to be cash and cash equivalents and investments with original maturities of more than three months but less than one year to be short-term investments. The carrying value, excluding gross unrealized holding gains or losses and fair value as of March 31, 2023 and December 31, 2022 were as follows:
March 31, 2023
Amortized Cost and Carrying ValueGross Unrealized GainsGross Unrealized Losses
Fair Value March 31, 2023
Classified as Cash and cash equivalents
U.S. Treasury Securities$4,962 $18 $— $4,980 
Classified as short-term investments
U.S. Treasury Securities$19,733 $67 $— $19,800 
December 31, 2022
Amortized Cost and Carrying ValueGross Unrealized GainsGross Unrealized Losses
Fair Value December 31, 2022
Classified as Cash and cash equivalents
U.S. Treasury Securities$19,864 $73 $— $19,937 
Classified as short-term investments
U.S. Treasury Securities$9,816 $33 $— $9,849