DWM1001 Custom Firmware threads

Good afternoon guys,
I wanted to know if something I’m doing in my application firmware is ok or not. According to the “DWM10001 firmware user guide” the user firmware must occupy 3KB RAM and 60KB Flash. In my code I have two threads, the app_thread_entry and the user_interface_manager using the following stack size:

#define THREAD_APP_STACK_SIZE (3 * 1024)
#define THREAD_UI_STACK_SIZE (1 * 1024)

Obviously both threads reserves 4KB, but my code is working so can you guys tell me if there is a risk? I leave the app_thread_entry as-is because I used the dwm_simple example code as reference