To start with, I never heard of them. I know Lithuania is trying to re-establish a flag carier. Maybe it is them, I still doubting that.
On their website I found no info about the course just the starting date.
I recommend you text/call/get there and ask A LOT of questions especially regarding the payment/estalments of payments etc. The "short contract" must also be discussed are they going to pay you salary or anything?
Also keep in mind ATRs do not have expensive TRs...
I am not fully certified pilot yet, but it is just my point and I know I might be just way too obvious

but as I stated in the begining, I really never heard of them neither saw them in the airport so it is a newly basted airliner.
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EDIT: Just realised it is Lithuanian/Norwegian company. Therefore you might want to ignore my post