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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Summary of Operating Lease Expense

Our lease expense comprises of the following (in thousands):

		Year Ended December 31,
		2021				2020				2019
Operating lease expense		$	6,265			$	6,267			$	6,886

Summary of Balance Sheet Classification of Operating Lease Liabilities

The balance sheet classification of our operating lease liabilities was as follows (in thousands):

		December 31, 2021				December 31, 2020
Operating lease liabilities:
Current portion of lease liabilities (included in other current liabilities)		$	2,577			$	3,247
Long-term portion of lease liabilities			34,316				34,789
Total operating lease liabilities		$	36,893			$	38,036

Summary of Maturities of Sublease Income and Operating Lease Liabilities

At December 31, 2021, the maturities of our sublease income and operating lease liabilities were as follows (in thousands):

Years ending December 31,		Sublease Income				Operating Lease Liabilities
2022		$	5,357			$	6,174
2023			5,518				5,634
2024			5,684				5,778
2025			5,854				5,927
2026			6,030				6,080
Thereafter			27,712				28,259
Total		$	56,155				57,852
Less:
Present value adjustment							(20,959	)
Total						$	36,893

Summary of Weighted Average Remaining Lease Term and Weighted Average Discount Rate

The weighted average remaining lease term and the weighted average discount rate used to determine the operating lease liability were as follows:

		December 31, 2021				December 31, 2020
Weighted average remaining lease term		9.1 years				9.1 years
Weighted average discount rate			10.1	%			10.1	%

Schedule of Material Purchase Commitments

The following summarizes our material purchase commitments at December 31, 2021 and the effect those obligations are expected to have on our liquidity and cash flows in future periods (in thousands):

Years ending December 31,		(in thousands)
2022		$	55,318
2023			9,312
2024			10,857
2025			11,367
2026			11,872
Thereafter			-
Total			98,726

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Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980

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