Learning more and more all the time, thanks Carpe Diem for sending me down another rabbitt hole :-)

https://www.accordclinical.com/clinical-study/types-of-clinical-trials/phase-iv-clinical-trials/

The above linked article has this to say: 

Phase IV research takes place after the FDA approves the marketing of a new drug. Through Phase IV clinical studies, new drugs can be tested continuously to uncover more information about efficacy, safety and side effects after being approved for marketing.

That same information is echoed on a wikipage for clinical trials:

https://en.wikipedia.org/wiki/Phases_of_clinical_research

So it would appear that going to Phase 4 would be awesome, as it would mean that Apabetalone would be an approved drug available on the market.  

Bring on Phase 4!!!