I sold all of my shares at $3.10 due to de-listing. It killed me to do it as I felt I was selling at the bottom - and it went into the mid $2 range. I read over the following presentation and am going to start a new position on Monday.
I see good upside from current levels, and still see their management as one of the better in the Montney.

http://www.advantageog.com/wp-content/uploads/2018/10/2018-AAV-October-Investor-Presentation-FINAL.pdf