In April, the Arelle team released version 2.39.11, introducing important regulatory finalizations, significant deployment optimizations, and internal code refactoring.

Compliance & Validation

• ESEF 2025: Finalized support for the ESEF 2025 reporting cycle.
• ESEF Authority Option: Introduced a new –esefAuthority configuration option across both the CLI and GUI.
• xBRL-CSV Support: Added metadata validation for xBRL-CSV Table Constraints.

Performance & Infrastructure

• Windows Performance: Significantly improved Windows startup performance, reducing launch time to 1–3 seconds.
• DockerHub Availability: The official Arelle Docker image is now published to DockerHub. It can be run using:
  docker run arelleproject/arelle:latest /opt/start.sh
• Installer Enhancements: Refined the Arelle installer, successfully cutting its size in half.
• Proxy Integration: Implemented improved proxy support for better environment compatibility.

Architecture & Code Quality

• Refactoring: Separated core responsibilities by extracting the PackageManager and PluginManager into distinct classes.
• Type Hints: Continued code modernization with more type hint coverage across the codebase.

To get involved with future work, please join the Arelle team monthly standup on the fourth Tuesday of each month at 1400 UTC. Please contact us for meeting details.