Canadian television company Corus Entertainment Inc. is working with Jefferies Financial Group to explore a sale of its business, according to people with knowledge of the situation.

It’s doing so less than four months after warning investors that its debt issues “may cast significant doubt about the company’s ability to continue as a going concern.”

Plans are in the early stages, said the people, who asked not to be identified discussing private negotiations. Corus did not reply to requests for comment while Jefferies declined to comment.