You may not get it today, but maybe later in the week. Covered CEPH here at $58.20 for another $.41, not gone long. Daily double bucker plus on that one...
If you want to sell short, you may need a second broker, as some brokers are just lousy at getting shares. The three I use (Fidelity, Tracktrade and Interactivebrokers) all have shares of NTRI...