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Fair value of financial instruments and marketable securities - Marketable Securities, Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | $ 306,198 |  | $ 259,778
Gross Unrealized, Gain | 67 |  | 340
Gross Unrealized, Loss | (186) |  | (14)
Fair Value | 306,079 |  | 260,104
Write downs of available for sale debt securities | 0 | $ 0 |
Increase in allowance for credit losses | 0 | 0 |
Realized gain (loss) from sale of marketable securities | 0 | $ 0 |
Commercial paper |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | 132,080 |  | 117,044
Gross Unrealized, Gain | 26 |  | 128
Gross Unrealized, Loss | (121) |  | (12)
Fair Value | 131,985 |  | 117,160
Corporate debt securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost |  |  | 1,650
Gross Unrealized, Loss |  |  | (2)
Fair Value |  |  | 1,648
Government obligations |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Amortized Cost | 174,118 |  | 141,084
Gross Unrealized, Gain | 41 |  | 212
Gross Unrealized, Loss | (65) |  |
Fair Value | $ 174,094 |  | $ 141,296

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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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