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Fair value measurements (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended	12 Months Ended
	Jul. 02, 2021	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2018
Transfer from level 1 to 2		$ 0	$ 0
Transfer from level 2 to level 1		0	0
Transfer into level 3		0	0
Transfer out of level 3		$ 0	$ 0
Warrants to Purchase Series G Preferred Shares | Biosense Webster, Inc.
Number of common shares converted from warrants	607,725
Warrant exercise price	$ 0.16			$ 0.01
Warrants to purchase common stock
Number of common shares converted from warrants	108,406	716,131
Warrant exercise price		$ 2.39

X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of transfers of liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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Amount of transfers of liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.

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Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy.

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Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy.

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