Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2022

Debt Disclosure [Abstract]

Summary of Long-term Debt

The following table summarizes the Company’s long-term debt:

	June 30,			December 31,
	2022			2021
4.75% Convertible Senior Notes, due June 1, 2042	$	172,500		$	—
4.25% Convertible Senior Notes, due March 1, 2037		23,916			23,916
3.90% Promissory Note, due through April 1, 2032		9,253			9,431
3.75% Callable Promissory Note, due through    September 1, 2036		7,060			7,246
4.55% Promissory Note, due through August 1, 2036		5,098			5,225
Finance lease liabilities, due through October 15, 2024		21			31
Total principal amount		217,848			45,849
Less: unamortized issuance costs		(6,200	)		(345	)
Total long-term debt	$	211,648		$	45,504

Summary of Future Maturities of Long-Term Debt

The following table summarizes future maturities of long-term debt as of June 30, 2022, which takes into consideration the assumption that the 4.75% Convertible Senior Notes and 4.25% Convertible Senior Notes are repurchased at their respective next earliest call dates:

Due in 12 months following June 30,
2022	$	1,026
2023		1,057
2024		1,096
2025		1,140
2026		197,603
Thereafter		15,926
Total	$	217,848

Schedule of Interest Expense Related to Long-Term Debt

Information with respect to interest expense related to long-term debt is as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Interest Expense:
Contractual interest	$	1,334	$	1,704	$	1,806	$	3,411
Non-cash expense (a)		119		271		159		539
Total	$	1,453	$	1,975	$	1,965	$	3,950

(a)Includes amortization of debt issuance costs.