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Investments
 3 Months Ended
Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Investments InvestmentsInvestments in fixed maturity securities as of March 31, 2022 and December 31, 2021 are classified as available-for-sale and are summarized in the table below:
$ in thousandsMarch 31, 2022December 31, 2021
Investment type
Amortized
Cost		Unrealized
(Losses) 		Fair
Value		Amortized
Cost		Unrealized
(Losses) 		Fair
Value
Corporate bonds
$30,154 $(139)$30,015 $32,349 $(17)$32,332 
Commercial paper
81,037 (226)80,811 — — — 
U.S. treasury bills22,358 (31)22,327 — — — 
Total(1)
$133,549 $(396)$133,153 $32,349 $(17)$32,332 
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(1)As of March 31, 2022, approximately $128.3 million have original maturities of ninety-one to 365 days and is disclosed as investments on our Condensed Consolidated Balance Sheets, and approximately $4.9 million of U.S. treasury bills with a maturity over one year is included within other long-term assets on the Condensed Consolidated Balance Sheets. The total balance as of December 31, 2021, have original maturities of ninety-one to 365 days and is disclosed as investments on our Condensed Consolidated Balance Sheets.
There were no credit losses recognized for the three months ended March 31, 2022 and March 31, 2021, and no allowance for credit losses as of March 31, 2022 and December 31, 2021. There were no realized gains or losses on investments during the three months ended March 31, 2022 and March 31, 2021