RE:PeersAn old list, but there is a publicly available two-year old report from Acumen, where they have a table of some valuation comparables on page 13:
Of course, some substantial changes since that time, but might point you to some companies to compare and get the more up-to-date metrics.
Post the expected closing of SSI, assuming $50 million debt, and $15 million EBITDA, PHA is currently trading at roughly EV/EBITDA = 70/15 = 4.7 times.