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Financial Instruments (Schedule of Financial Instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	$ 29,036	$ 26,770
Contingent consideration	(51,720)	(63,890)
Total liabilities	(51,720)	(63,890)
Money market funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents:	21,487	22,802
Certificates of deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents:	3,490	3,968
Endospan Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Endospan Loans	4,059
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	24,977	26,770
Contingent consideration	0	0
Total liabilities	0	0
Level 1 | Money market funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents:	21,487	22,802
Level 1 | Certificates of deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents:	3,490	3,968
Level 1 | Endospan Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Endospan Loans	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	0
Contingent consideration	0	0
Total liabilities	0	0
Level 2 | Money market funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents:	0	0
Level 2 | Certificates of deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents:	0	0
Level 2 | Endospan Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Endospan Loans	0
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	4,059	0
Contingent consideration	(51,720)	(63,890)
Total liabilities	(51,720)	(63,890)
Level 3 | Money market funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents:	0	0
Level 3 | Certificates of deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents:	0	$ 0
Level 3 | Endospan Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Endospan Loans	$ 4,059

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- Definition

Fair value portion of asset recognized for present right to economic benefit.

+ References

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-Topic 820
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Fair value of financial and nonfinancial obligations.

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- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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