Here is my personal thinking.
The CEO has a track record of shaping up companies for sale and presumably that is his mission at PTX. They have pretty much said the company is for sale and that they are looking to consider offers by March (if I recall correctly).
Although the company is clearly for sale, PTX had to get the settlement out of the way before they could proceed. NO buyer in their right mind would make a commitment with the settlement amount still out there as an unknown.
Now that the settlement amount is known, I expect PTX to market itself with a more aggressive and specific timeline.
I do not have a prediction as to the potential buyout price, or timing. The current market cap is low relative to revenues, suggesting we could well see a premium, maybe a substantial premium, over today's price. The fact that PTX only dropped as far as it did suggests that the settlement was substantially priced in.
fwiw I added some shares on Friday.