On Jan 26th 2016 the SHK reported that the investigation managed to read out both cockpit voice and flight data recorder, the CVR does contain the talks of the crew during the accident flight. The investigation is currently analysing and validating the recordings. A preliminary report is estimated to be released in a week or two.
Quote from AvHerald,
Crash: West Atlantic Sweden CRJ2 near Akkajaure on Jan 8th 2016, lost height after emergency call
So they have had the data for slightly over a month at this time.