From Cryptopia Twitter:

We are making progress on securing our wallets, you can check the status here:
https://cryptopia.co.nz/CoinInfo/?coin=XJO …
Offline means the coins have not been checked yet.
In Maintenance means coin has been secured.
The maintenance message will detail the impact the event had on that coin.

According to this new information, Joulecoin seems to have been unaffected by the breach.