Leases	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Leases	10. Leases We have operating and finance lease obligations resulting from the lease of land and buildings that comprise our corporate headquarters and various manufacturing facilities; leases related to additional manufacturing, office, and warehouse space; leases on Company vehicles; and leases on a variety of office and other equipment. On January 6, 2021 we executed a modification to extend the lease of our headquarters located in Kennesaw, Georgia. This modification resulted in an increase in the present value of future lease obligations and corresponding right-of-use asset of $23.3 million, using a discount rate of 6.41%. On June 1, 2021 we began occupancy of the newly constructed addition to our leased JOTEC headquarters located in Hechingen, Germany. This lease resulted in an increase in the present value of future lease obligations and corresponding right-of-use asset of $9.8 million, using a discount rate of 5.46%. Supplemental consolidated balance sheet information related to leases was as follows (in thousands, except lease term and discount rate):‎ Operating leases:December 31, 2021 December 31, 2020Operating lease right-of-use assets$58,097 $28,242Accumulated amortization (12,383) (9,671)Operating lease right-of-use assets, net$45,714 $18,571 Current maturities of operating leases$3,149 $5,763Non-current maturities of operating leases 44,869 14,034Total operating lease liabilities$48,018 $19,797 Finance leases: Property and equipment, at cost$ 6,759 $ 7,620Accumulated amortization (2,105) (1,905)Property and equipment, net$ 4,654 $ 5,715 Current maturities of finance leases$ 528 $ 614Non-current maturities of finance leases 4,374 5,300Total finance lease liabilities$ 4,902 $ 5,914 Weighted average remaining lease term (in years): Operating leases 12.5 5.1Finance leases 8.8 9.8 Weighted average discount rate: Operating leases 5.8% 5.2%Finance leases 2.0% 2.0% Current maturities of finance leases are included as a component of Other current liabilities and non-current maturities of finance leases are included as a component of Other long-term liabilities on our Consolidated Balance Sheets. A summary of lease expenses for our finance and operating leases included in General, administrative, and marketing expenses on our Consolidated Statements of Operations and Comprehensive Loss are as follows (in thousands): December 31, 2021 December 31, 2020Amortization of property and equipment$ 596 $ 643Interest expense on finance leases 110 118 Total finance lease expense 706 761Operating lease expensea 7,521 7,145Sublease income (399) (905) Total lease expense$7,828 $7,001_____________________a    Total rental expense for operating leases was $6.6 million in 2019. A summary of our supplemental cash flow information is as follows (in thousands): Cash paid for amounts included in the measurement of lease liabilities:2021 2020 Operating cash flows for operating leases$ 6,061 $ 7,407 Financing cash flows for finance leases 557 653 Operating cash flows for finance leases 105 126 Future minimum lease payments and sublease rental income are as follows (in thousands):‎ Finance Operating Sublease Leases Leases Income2022$ 600 $ 5,928 $ 3062023 629 5,619 --2024 623 6,174 --2025 599 5,188 --2026 579 4,797 --Thereafter 2,318 42,210 --Total minimum lease payments$ 5,348 $ 69,916 $ 306Less amount representing interest 446 21,898 Present value of net minimum lease payments 4,902 48,018 Less current maturities 528 3,149 Lease obligations, less current maturities$ 4,374 $ 44,869