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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