{"cik":1517413,"taxonomy":"us-gaap","tag":"IncreaseDecreaseInAccountsReceivable","label":"Increase (Decrease) in Accounts Receivable","description":"The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.","entityName":"FASTLY, INC.","units":{"USD":[{"start":"2017-01-01","end":"2017-12-31","val":6043000,"accn":"0001517413-20-000043","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-04","frame":"CY2017"},{"start":"2018-01-01","end":"2018-06-30","val":3375000,"accn":"0001517413-19-000012","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2018-01-01","end":"2018-09-30","val":4442000,"accn":"0001517413-19-000022","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2018-01-01","end":"2018-12-31","val":6234000,"accn":"0001517413-20-000043","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-04"},{"start":"2018-01-01","end":"2018-12-31","val":6234000,"accn":"0001517413-21-000030","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-01","frame":"CY2018"},{"start":"2019-01-01","end":"2019-03-31","val":4586000,"accn":"0001517413-20-000094","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-08","frame":"CY2019Q1"},{"start":"2019-01-01","end":"2019-06-30","val":3882000,"accn":"0001517413-19-000012","fy":2019,"fp":"Q2","form":"10-Q","filed":"2019-08-09"},{"start":"2019-01-01","end":"2019-06-30","val":3882000,"accn":"0001517413-20-000162","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2019-01-01","end":"2019-09-30","val":9520000,"accn":"0001517413-19-000022","fy":2019,"fp":"Q3","form":"10-Q","filed":"2019-11-08"},{"start":"2019-01-01","end":"2019-09-30","val":9520000,"accn":"0001517413-20-000263","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-06"},{"start":"2019-01-01","end":"2019-12-31","val":12767000,"accn":"0001517413-20-000043","fy":2019,"fp":"FY","form":"10-K","filed":"2020-03-04"},{"start":"2019-01-01","end":"2019-12-31","val":12767000,"accn":"0001517413-21-000030","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-01"},{"start":"2019-01-01","end":"2019-12-31","val":12767000,"accn":"0001517413-22-000038","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-01","frame":"CY2019"},{"start":"2020-01-01","end":"2020-03-31","val":6031000,"accn":"0001517413-20-000094","fy":2020,"fp":"Q1","form":"10-Q","filed":"2020-05-08"},{"start":"2020-01-01","end":"2020-03-31","val":6031000,"accn":"0001517413-21-000069","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07","frame":"CY2020Q1"},{"start":"2020-01-01","end":"2020-06-30","val":22211000,"accn":"0001517413-20-000162","fy":2020,"fp":"Q2","form":"10-Q","filed":"2020-08-07"},{"start":"2020-01-01","end":"2020-06-30","val":22211000,"accn":"0001517413-21-000154","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-06"},{"start":"2020-01-01","end":"2020-09-30","val":6669000,"accn":"0001517413-20-000263","fy":2020,"fp":"Q3","form":"10-Q","filed":"2020-11-06"},{"start":"2020-01-01","end":"2020-09-30","val":6669000,"accn":"0001517413-21-000195","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-08"},{"start":"2020-01-01","end":"2020-12-31","val":9264000,"accn":"0001517413-21-000030","fy":2020,"fp":"FY","form":"10-K","filed":"2021-03-01"},{"start":"2020-01-01","end":"2020-12-31","val":9264000,"accn":"0001517413-22-000038","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-01"},{"start":"2020-01-01","end":"2020-12-31","val":9264000,"accn":"0001517413-23-000035","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-27","frame":"CY2020"},{"start":"2021-01-01","end":"2021-03-31","val":1685000,"accn":"0001517413-21-000069","fy":2021,"fp":"Q1","form":"10-Q","filed":"2021-05-07"},{"start":"2021-01-01","end":"2021-03-31","val":1685000,"accn":"0001517413-22-000059","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05","frame":"CY2021Q1"},{"start":"2021-01-01","end":"2021-06-30","val":5612000,"accn":"0001517413-21-000154","fy":2021,"fp":"Q2","form":"10-Q","filed":"2021-08-06"},{"start":"2021-01-01","end":"2021-06-30","val":5612000,"accn":"0001517413-22-000121","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-05"},{"start":"2021-01-01","end":"2021-09-30","val":4017000,"accn":"0001517413-21-000195","fy":2021,"fp":"Q3","form":"10-Q","filed":"2021-11-08"},{"start":"2021-01-01","end":"2021-09-30","val":4017000,"accn":"0001517413-22-000159","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-04"},{"start":"2021-01-01","end":"2021-12-31","val":14563000,"accn":"0001517413-22-000038","fy":2021,"fp":"FY","form":"10-K","filed":"2022-03-01"},{"start":"2021-01-01","end":"2021-12-31","val":14563000,"accn":"0001517413-23-000035","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-27"},{"start":"2021-01-01","end":"2021-12-31","val":14563000,"accn":"0001517413-24-000048","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-22","frame":"CY2021"},{"start":"2022-01-01","end":"2022-03-31","val":9219000,"accn":"0001517413-22-000059","fy":2022,"fp":"Q1","form":"10-Q","filed":"2022-05-05"},{"start":"2022-01-01","end":"2022-03-31","val":9219000,"accn":"0001517413-23-000093","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-03","frame":"CY2022Q1"},{"start":"2022-01-01","end":"2022-06-30","val":4122000,"accn":"0001517413-22-000121","fy":2022,"fp":"Q2","form":"10-Q","filed":"2022-08-05"},{"start":"2022-01-01","end":"2022-06-30","val":4122000,"accn":"0001517413-23-000218","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-02"},{"start":"2022-01-01","end":"2022-09-30","val":10071000,"accn":"0001517413-22-000159","fy":2022,"fp":"Q3","form":"10-Q","filed":"2022-11-04"},{"start":"2022-01-01","end":"2022-09-30","val":10071000,"accn":"0001517413-23-000303","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-03"},{"start":"2022-01-01","end":"2022-12-31","val":27359000,"accn":"0001517413-23-000035","fy":2022,"fp":"FY","form":"10-K","filed":"2023-02-27"},{"start":"2022-01-01","end":"2022-12-31","val":27359000,"accn":"0001517413-24-000048","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-22"},{"start":"2022-01-01","end":"2022-12-31","val":27359000,"accn":"0001517413-25-000063","fy":2024,"fp":"FY","form":"10-K","filed":"2025-02-26","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-3701000,"accn":"0001517413-23-000093","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-03"},{"start":"2023-01-01","end":"2023-03-31","val":-3701000,"accn":"0001517413-24-000104","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-01","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-10183000,"accn":"0001517413-23-000218","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-02"},{"start":"2023-01-01","end":"2023-06-30","val":-10183000,"accn":"0001517413-24-000175","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-08"},{"start":"2023-01-01","end":"2023-09-30","val":10355000,"accn":"0001517413-23-000303","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-03"},{"start":"2023-01-01","end":"2023-09-30","val":10355000,"accn":"0001517413-24-000216","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-07"},{"start":"2023-01-01","end":"2023-12-31","val":32945000,"accn":"0001517413-24-000048","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-22"},{"start":"2023-01-01","end":"2023-12-31","val":32945000,"accn":"0001517413-25-000063","fy":2024,"fp":"FY","form":"10-K","filed":"2025-02-26"},{"start":"2023-01-01","end":"2023-12-31","val":32945000,"accn":"0001517413-26-000053","fy":2025,"fp":"FY","form":"10-K","filed":"2026-02-25","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-12028000,"accn":"0001517413-24-000104","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-01"},{"start":"2024-01-01","end":"2024-03-31","val":-12028000,"accn":"0001517413-25-000111","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-07","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":-5274000,"accn":"0001517413-24-000175","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-08"},{"start":"2024-01-01","end":"2024-06-30","val":-5274000,"accn":"0001517413-25-000218","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-06"},{"start":"2024-01-01","end":"2024-09-30","val":-1298000,"accn":"0001517413-24-000216","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-07"},{"start":"2024-01-01","end":"2024-09-30","val":-1298000,"accn":"0001517413-25-000299","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-07"},{"start":"2024-01-01","end":"2024-12-31","val":-676000,"accn":"0001517413-25-000063","fy":2024,"fp":"FY","form":"10-K","filed":"2025-02-26"},{"start":"2024-01-01","end":"2024-12-31","val":-676000,"accn":"0001517413-26-000053","fy":2025,"fp":"FY","form":"10-K","filed":"2026-02-25","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":3993000,"accn":"0001517413-25-000111","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-07"},{"start":"2025-01-01","end":"2025-03-31","val":3993000,"accn":"0001517413-26-000132","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-06","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":3324000,"accn":"0001517413-25-000218","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-06"},{"start":"2025-01-01","end":"2025-09-30","val":-3574000,"accn":"0001517413-25-000299","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-07"},{"start":"2025-01-01","end":"2025-12-31","val":6222000,"accn":"0001517413-26-000053","fy":2025,"fp":"FY","form":"10-K","filed":"2026-02-25","frame":"CY2025"},{"start":"2026-01-01","end":"2026-03-31","val":13526000,"accn":"0001517413-26-000132","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-06","frame":"CY2026Q1"}]}}