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Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |  |
Investments | $ 29,944 |  | $ 26,805
Equity method investment | 414 |  | 451
Total investments | 30,358 |  | 27,256
Respicardia Inc. | Equity Method Investee | Prepaid expenses and other current assets |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Outstanding loans | 800 |  | 600
ALung Technologies, Inc. | Convertible Notes Receivable |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Outstanding loans | 2,000 |  |
Notes receivable gross |  | $ 2,000 |
Respicardia Inc. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments | 17,706 |  | 17,706
ALung Technologies, Inc. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments | 3,000 |  | 0
Ceribell, Inc. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments | 3,000 |  | 3,000
ShiraTronics, Inc. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments | 2,045 |  | 2,045
MD Start II |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments | 1,169 |  | 1,121
Rainbow Medical Ltd. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments | 1,145 |  | 1,099
Highlife S.A.S. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments | 1,109 |  | 1,064
Other |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments | $ 770 |  | $ 770

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