Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt securities and restricted investments
Amortized Cost		$ 49,206
Gross Unrealized Gains		16
Fair Value		49,222
Unrestricted available-for-sale, Debt securities
Debt securities and restricted investments
Amortized Cost		48,046
Gross Unrealized Gains		5
Fair Value		48,051
Unrestricted available-for-sale, Debt securities \| U.S. Treasury Bills
Debt securities and restricted investments
Amortized Cost	$ 88,966	47,986
Gross Unrealized Gains	1	5
Gross Unrealized (Losses)	(11)
Fair Value	$ 88,956	47,991
Unrestricted available-for-sale, Debt securities \| Corporate debt securities
Debt securities and restricted investments
Amortized Cost		60
Fair Value		60
Restricted
Debt securities and restricted investments
Amortized Cost		1,160
Gross Unrealized Gains		11
Fair Value		1,171
Restricted \| Short-term bond
Debt securities and restricted investments
Amortized Cost		1,160
Gross Unrealized Gains		11
Fair Value		$ 1,171

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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Amount, before tax, of unrealized loss 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 excluding accrued interest, before allowance for credit loss, 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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-Publisher FASB
-Name Accounting Standards Codification
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Amount excluding accrued interest, 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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