Nordic Countries - GOT: Nils Ericson Terminal opening hours?

Does anyone know if the Nils Ericson Terminal in Gothenburg stays open all night? I'm thinking of arriving by bus from Oslo at 02:45 and then catching the first airport bus that goes at 04:20. An 1 1/2 hour wait is OK inside, but I'm not too keen to do it outside in January.

Monday -Thursday the opening hours are : 04.15 - 01.30
Open Friday 04.15- Sunday at midnight.

The main train station is right next door, however its opening hours are less generous.