XML 20 R10.htm IDEA: XBRL DOCUMENT v3.22.2
Marketable Securities
6 Months Ended
Jun. 30, 2022
Investments [Abstract]  
Marketable Securities Marketable Securities
The amortized cost, unrealized gain (loss), and estimated fair value of the Company's investments in securities available for sale consisted of the following:
June 30, 2022
Amortized CostUnrealized GainUnrealized LossEstimated Fair Value
Marketable securities
U.S. government securities$420,162 $— $(9,713)$410,449 
Commercial paper18,972— 18,972
Corporate debt securities15,631(179)15,452
Total marketable securities$454,765 $— $(9,892)$444,873 

December 31, 2021
Amortized CostUnrealized GainUnrealized LossEstimated Fair Value
Marketable securities
U.S. government securities$420,392 $— $(2,107)$418,285 
Commercial paper13,878— 13,878
Asset-backed securities2,003(1)2,002
Corporate debt securities18,7313(24)18,710
Total marketable securities$455,004 $$(2,132)$452,875 
The Company had eighteen and eight separate marketable securities in unrealized loss positions as of June 30, 2022 and December 31, 2021, respectively. The Company did not identify any marketable securities that were other-than-temporarily impaired as of June 30, 2022 and December 31, 2021. The Company does not intend to sell any marketable securities that have unrealized losses on June 30, 2022 and it is not more likely than not that the Company will be required to sell such securities before any anticipated recovery.
The following table summarizes the stated maturities of the Company’s marketable securities:
June 30, 2022December 31, 2021
Amortized CostEstimated Fair ValueAmortized CostEstimated Fair Value
Due within one year$342,294 $335,772 $64,914 $64,879 
Due after one year through two years112,471109,101390,090387,996
Total$454,765 $444,873 $455,004 $452,875