Leases - Maturity of Lease Liabilities and Other Information (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Nov. 30, 2018
Maturity of Lease Liabilities
2022	$ 9,390
2023	9,655
2024	9,865
2025	10,133
2026	10,425
Thereafter	36,552
Total operating lease payments	86,020
Less: Estimated tenant improvement allowance	(10,214)	$ (12,100)
Less: Imputed interest	(22,622)
Present value of operating lease liabilities	53,184	57,087
Operating cash flows from operating leases	$ 8,971	$ 3,804
Weighted-average remaining lease term (years)	8 years 3 months 18 days
Weighted-average discount rate	8.64%
Sublease
Maturity of Lease Liabilities
2022	$ 1,717
2023	1,768
2024	1,821
2025	1,876
2026	1,932
Thereafter	3,516
Total operating lease payments	$ 12,630
9.0% Non-Recourse 2033 Notes
Maturity of Lease Liabilities
Interest rate (as a percent)	9.00%		9.00%

The amount of tenant improvement allowance on operating leases as of the balance sheet date.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of lessee's undiscounted obligation for lease payment for operating lease.

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Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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