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Investments - Equity Investments Included on the Balance Sheet (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 28, 2021	Mar. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Investments		$ 36,436	$ 30,701
Equity method investment		336	393
Total investments		36,772	31,094
Respicardia Inc.
Schedule of Equity Method Investments [Line Items]
Investments		21,796	17,706
Respicardia Inc. | Prepaid Expenses and Other Current Assets | Cost Method Investee
Schedule of Equity Method Investments [Line Items]
Outstanding loans		1,300	800
ALung Technologies, Inc.
Schedule of Equity Method Investments [Line Items]
Investments		3,000	3,000
ALung Technologies, Inc. | Prepaid Expenses and Other Current Assets | Cost Method Investee
Schedule of Equity Method Investments [Line Items]
Outstanding loans		2,500	2,500
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
Noctrix Health, Inc
Schedule of Equity Method Investments [Line Items]
Investments		3,159	1,359
MD Start II
Schedule of Equity Method Investments [Line Items]
Investments		1,174	1,227
Rainbow Medical Ltd.
Schedule of Equity Method Investments [Line Items]
Investments		1,149	1,201
Highlife S.A.S.
Schedule of Equity Method Investments [Line Items]
Investments		1,113	1,163
Zoll Medical Corporation | Cost Method Investee
Schedule of Equity Method Investments [Line Items]
Gain (loss) on investment		4,600
Zoll Medical Corporation | Cost Method Investee | Subsequent Event
Schedule of Equity Method Investments [Line Items]
Proceeds from investment	$ 23,100
Zoll Medical Corporation | Prepaid Expenses and Other Current Assets | Cost Method Investee
Schedule of Equity Method Investments [Line Items]
Outstanding loans		$ 17,700	$ 800

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