I have not done any thorough research yet, but this is what their website says:
'In an intensive language course the participant follows lessons for the whole day, every day, for one or more weeks. This type is suitable for participants who want or need to bring their knowledge of a foreign language up to a higher level in a short period of time and who are motivated and able to work on learning a language (almost) full time over a period of time.
If so desired, we can organise accommodation for you or your employees in collaboration with hotels of different categories within walking distance of our training centre.'