Investments - Schedule of investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Investments
Amortized Cost, 12 Months or Longer, Less Than 12 Months	$ 158,810	$ 177,096
Gross Unrealized Loss, Less Than 12 Months	(981)	(560)
Total Fair Value, Less Than 12 Months	157,829	176,536
Amortized Cost, 12 Months or Longer	18,668	0
Gross Unrealized Gain (Loss), 12 Months or Longer	(127)	0
Total Fair Value, 12 Months or Longer	18,541	0
Amortized Cost, Total	177,478	177,096
Gross Unrealized Loss, Total	(1,108)	(560)
Fair Value, Total	176,370	176,536
U.S. government securities
Investments
Amortized Cost, 12 Months or Longer, Less Than 12 Months	158,810	177,096
Gross Unrealized Loss, Less Than 12 Months	(981)	(560)
Total Fair Value, Less Than 12 Months	157,829	176,536
Amortized Cost, 12 Months or Longer	18,668	0
Gross Unrealized Gain (Loss), 12 Months or Longer	(127)	0
Total Fair Value, 12 Months or Longer	18,541	0
Amortized Cost, Total	177,478	177,096
Gross Unrealized Loss, Total	(1,108)	(560)
Fair Value, Total	$ 176,370	$ 176,536

Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months Or Longer, Amortized Cost

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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