Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Marketable Securities [Line Items]
Adjusted Cost	$ 175,539	$ 72,859
Unrealized Gains	0	7
Unrealized Losses	(49)	(2)
Fair Value	175,490	72,864
Corporate bonds
Marketable Securities [Line Items]
Adjusted Cost	146,032	55,224
Unrealized Gains	0	5
Unrealized Losses	(30)	(2)
Fair Value	146,002	55,227
Government bonds
Marketable Securities [Line Items]
Adjusted Cost		14,121
Unrealized Gains		2
Unrealized Losses		0
Fair Value		14,123
Asset-backed bonds
Marketable Securities [Line Items]
Adjusted Cost	29,507	3,514
Unrealized Gains	0	0
Unrealized Losses	(19)	0
Fair Value	$ 29,488	$ 3,514

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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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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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