NxThera Inc., a Minnesota-based startup developing a thermal vapor prostate treatment, is bringing in millions of extra investment dollars, including from a corporate partner.

The company disclosed in a recent Securities & Exchange Commission filing that it’s already raised $8.7 million in a $14.75 million equity-based offering that closes June 30.

NxThera CEO Robert Paulson said there will be an announcement of new investors in the near future, including a “strategic corporate partner.” Paulson declined to provide more details.