What is the debt of Vertex Energy?

Can you clarify the current debt situation of Vertex Energy for me? Are we looking at short-term or long-term liabilities? Is there any information available on the company's credit ratings or the interest rates on their outstanding loans? Additionally, have there been any recent changes in the company's debt levels that investors should be aware of? It would be great if you could provide an overview of the company's financial health in terms of its debt position.