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Fair value of financial instruments and investments - Available-for-sale securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Securities in an unrealized loss position greater than 12 months - Unrealized losses	$ (24)	$ (499)
Securities in an unrealized loss position greater than 12 months - Fair Value	1,625	10,186
Total - Unrealized losses	(24)	(499)
Total - Fair Value	1,625	10,186
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Securities in an unrealized loss position greater than 12 months - Unrealized losses	(24)	(499)
Securities in an unrealized loss position greater than 12 months - Fair Value	1,625	10,186
Total - Unrealized losses	(24)	(499)
Total - Fair Value	$ 1,625	$ 10,186

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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