in € thousand

  ​ ​ ​

2025

  ​ ​ ​

2024

  ​ ​ ​

2023

Personnel expenses

(87)

(1,029)

(1,504)

Depreciation/amortization

(1,294)

(1,423)

(1,817)

Legal and consulting fees

(316)

(379)

(587)

R&D related external administration

(894)

(917)

(957)

Other research and development expenses

(191)

(227)

(283)

Total research and development expenses

(2,781)

(3,974)

(5,148)