TX ID: 0x3acef4fcd04f0edc58ca48d13696eeabe7e46a95a5716fdd3a97af8fb400b31b
It is not about the amount. Some people was stolen more. See comments under this address in Etherscan please. I can be wrong, it can be maybe phishing site and not from EtherDelta.
How that happened, are you sure you clicked on correct link and not phishing link?
Etherdelta is safe as far as i know.
My Ether also got stolen by this adress: 0xa0A761fF5ba114A08e9420a71b93F02c4A089531
I think we are victims of a phising site called: etheridelta.com
Is there anything we can do about it?
No. You have to be very careful with links these days, every second link is phishing site.