Financial Instruments (Schedule of Financial Instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
ASSETS
Endospan Loans	$ 19,872	$ 9,535
Total assets	41,677	32,786
Liabilities:
Current portion of contingent consideration	20,690
Non-current contingent consideration	39,890	52,880
Total liabilities	60,580	52,880
Level 1
ASSETS
Endospan Loans	0	0
Total assets	21,805	23,251
Liabilities:
Current portion of contingent consideration	0
Non-current contingent consideration	0	0
Total liabilities	0	0
Level 2
ASSETS
Endospan Loans	0	0
Total assets	0	0
Liabilities:
Current portion of contingent consideration	0
Non-current contingent consideration	0	0
Total liabilities	0	0
Level 3
ASSETS
Endospan Loans	19,872	9,535
Total assets	19,872	9,535
Liabilities:
Current portion of contingent consideration	20,690
Non-current contingent consideration	39,890	52,880
Total liabilities	60,580	52,880
Money market funds
ASSETS
Cash equivalents:	20,725	18,182
Money market funds | Level 1
ASSETS
Cash equivalents:	20,725	18,182
Money market funds | Level 2
ASSETS
Cash equivalents:	0	0
Money market funds | Level 3
ASSETS
Cash equivalents:	0	0
Certificates of deposit
ASSETS
Cash equivalents:	1,080	5,069
Certificates of deposit | Level 1
ASSETS
Cash equivalents:	1,080	5,069
Certificates of deposit | Level 2
ASSETS
Cash equivalents:	0	0
Certificates of deposit | Level 3
ASSETS
Cash equivalents:	$ 0	$ 0