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Marketable Securities
6 Months Ended
Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities Marketable Securities 
The Company has investments in available-for-sale debt securities which 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, net of income tax effects. As of June 30, 2024, 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 June 30, 2024 and December 31, 2023, respectively:
June 30, 2024
Marketable Securities:Adjusted CostUnrealized GainsUnrealized LossesFair Value
Government securities - U.S.$42,320 $215 $— $42,535 
Total$42,320 $215 $— $42,535 
December 31, 2023
Marketable Securities:Adjusted CostUnrealized GainsUnrealized LossesFair Value
Government securities - U.S.$72,990 $954 $— $73,944 
Total$72,990 $954 $— $73,944 

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, net in the accompanying unaudited condensed consolidated statements of loss.

The Company recognized gross realized gains of $709 and no gross realized losses for the three months ended June 30, 2024. The Company recognized gross realized gains of $1,107 and no gross realized losses for the six months ended June 30, 2024. The Company recognized immaterial gross realized gains and losses for the three and six months ended June 30, 2023.

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 June 30, 2024:

Maturities
Marketable Debt Securities:Less than 1 Year1-5 Years5-10 YearsGreater than 10 YearsTotal
Government securities - U.S.$42,535 $— $— $— $42,535 
Total$42,535 $— $— $— $42,535 

The Company has classified its investment in available-for-sale marketable debt securities as current assets in the condensed 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.