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Employee benefit plans - Fair Value Assumptions for Restricted Stock Units and ESPP (Details)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Interest Rate, Minimum 5.00%    
Interest Rate, Maximum 5.60% 3.10%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Expected Term 6.10 6.10 6.10
Interest Rate, Maximum 5.60% 3.10%  
Employee Stock Purchase Plan Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Volatility Rate, Minimum 39.00% 39.00% 64.00%
Dividend yield 0.00% 0.00% 0.00%
Volatility Rate, Maximum 42.00% 55.00% 80.00%
Interest Rate, Minimum   0.70%  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Expected Term 0.5 0.5 0.5
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate     0.10%
Dividend yield 0.00% 0.00% 0.00%
Equity Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Volatility Rate, Minimum 59.00%    
Dividend yield 0.00% 0.00% 0.00%
Volatility Rate, Maximum 60.00% 62.00%  
Interest Rate, Minimum 3.50% 2.00% 0.70%
Interest Rate, Maximum 4.50% 3.90% 1.10%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate   60.00% 64.00%
Interest Rate, Maximum 4.50% 3.90% 1.10%
Dividend yield 0.00% 0.00% 0.00%