Sad to say, but my belief is that you got "restricted stock" in the form of a dividend. This is done as part of a "registered spinoff" a technique Garrett "KRABman" Krause uses to create new POS BB companies.
(Actually, Garrett uses a twist on the registered spinout, but the results are the same). IMO You are holind what is very likely worthless paper.
Your best bet is to re-examine the SHAL release and make sure that they specified that the stock dividend was restricted. If so, you are stuck, if not, speak to your broker's compliance officer.
My other recommendation is to read flodyie's Truthseeker Report on SHAL. It is VERY enlightening.
PS From a fundamental perspective SLNN is a total POS.