As a privately-held company, Mesa does not report their balance sheet (and other specs) to the SEC so we can look over their shoulders. You'd need to know an insider (company employee, stock-holder, etc.) to see the information. Subject, also, to possible misinformation released/leaked for strategic purposes.

Come negotiating time, you would expect them to release limited information to support their positions to the other side's negotiators. If those negotiators are smart, they would demand audited figures, to avoid slanted data.

Sometimes, you just have to read the tea leaves and extrapolate around what you (think you) know.