Summary of significant accounting and reporting policies - Schedule of Subsidiaries (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Sequans Communications Ltd. | |
| Disclosure of subsidiaries [line items] | |
| % equity interest | 100.00% |
| Sequans Communications Inc. | |
| Disclosure of subsidiaries [line items] | |
| % equity interest | 100.00% |
| Sequans Communications Ltd. Pte. | |
| Disclosure of subsidiaries [line items] | |
| % equity interest | 100.00% |
| Sequans Communications Israel (2009) Ltd. | |
| Disclosure of subsidiaries [line items] | |
| % equity interest | 100.00% |
| Sequans Communications Finland Oy | |
| Disclosure of subsidiaries [line items] | |
| % equity interest | 100.00% |
| Sequans Communications SAS | |
| Disclosure of subsidiaries [line items] | |
| % equity interest | 100.00% |
| Sequans Communications SAS | |
| Disclosure of subsidiaries [line items] | |
| % equity interest | 100.00% |
| ACP Advanced Circuit Pursuit AG | |
| Disclosure of subsidiaries [line items] | |
| % equity interest | 100.00% |