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Marketable Securities
12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities Marketable Securities 
The Company has investments in available-for-sale debt securities that are recorded at fair market value. The change in the fair value of available-for-sale debt investments is recorded as accumulated other comprehensive loss in shareholders’ equity (deficit), net of income tax effects. As of December 31, 2023, the Company considered any decreases in fair value on its marketable securities to be driven by factors other than credit risk, including market risk.

The following tables show the Company’s available-for-sale securities’ adjusted cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category as of December 31, 2023 and 2022, respectively:
2023
Marketable Securities:Adjusted CostUnrealized GainsUnrealized LossesFair Value
Government securities - U.S.$72,990 $954 $— $73,944 
Total$72,990 $954 $— $73,944 
2022
Marketable Securities:Adjusted CostUnrealized GainsUnrealized LossesFair Value
Mutual and money market funds$24,407 $— $(1,889)$22,518 
Total$24,407 $— $(1,889)$22,518 

The Company determines realized gains or losses on the sale of marketable securities on a specific identification method. The Company reflects these gains and losses as a component of investment and other income (expense), net in the accompanying consolidated statements of loss.

The Company recognized gross realized gains of $988, $584 and $174 for the twelve months ended December 31, 2023, 2022 and 2021, respectively. These realized gains were offset by realized losses of $2,791, $2,338 and $275 for the twelve-months ended December 31, 2023, 2022 and 2021, respectively.
The following table summarizes the estimated fair value of the Company’s investments in marketable debt securities, accounted for as available-for-sale debt securities and classified by the contractual maturity date of the securities as of December 31, 2023:
Maturities
Marketable Debt Securities:Less than 1 Year1-5 Years5-10 YearsGreater than 10 YearsTotal
Government securities - U.S.$73,944 $— $— $— $73,944 
Total$73,944 $— $— $— $73,944 
The Company has classified its investment in available-for-sale marketable debt securities as current assets in the consolidated balance sheets as the securities need to be available for use, if required, to fund current operations. There are no restrictions on the sale of any securities in the Company’s investment portfolio.