Investments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Dec. 31, 2021
Investments
Investments - Available-for-sale	$ 62,396	$ 0
Available-for-sale investments
Adjusted Cost	62,817
Gross Unrealized Gains	1
Gross Unrealized (Losses)	(422)
Estimated Fair Value	62,396
Net unrealized gain (loss) on available-for-sale debt securities	323
Corporate bonds
Available-for-sale investments
Adjusted Cost	30,468
Gross Unrealized Gains	1
Gross Unrealized (Losses)	(315)
Estimated Fair Value	30,154
Commercial paper
Available-for-sale investments
Adjusted Cost	32,349
Gross Unrealized (Losses)	(107)
Estimated Fair Value	$ 32,242

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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