If they owe you money they owe you money. That does not mean they will pay you. That's when you get an attorney involved.
Do you have anything in an employee handbook or anything that states the pay dates/pay period workings? If so then you need to have a sit down with your employers about what your expectations are and when you expect to be paid. I'd have a deadline in mind but the fits thing I'd ask them is what is going on.
They may have bought the company expecting certain things and found all sorts of hidden issues and financial problems.
We got a new executive director when I was working at a sheltered workshop. When they sat down with the finances they found all sorts of complications. The state requires a company like this to have 3 months working capitol in the bank at all times or they can close the facility down. The previous director had been using funds to several things and not managing the finances correctly. She had been "hiring" her boyfriend to come in and teach ETL classes. She would put him up in a hotel and pay compensation for his meals and such. She was staying with him in one of the nicest hotels in town and they were eating room service meal after meal. He was someone they would have hired anyway BUT the director should have put the man in a less expensive hotel and allowed him a certain dollar amount for food compensation.
She was funding all sorts of other activities and not charging them to the correct agency for billing. She made a mess of the company money. It nearly cost the company the whole workshop, group homes, supported living and shared living homes, etc....
When the new director came in and discovered these discrepancies they shut down everything that could wait to put every penny they could into the bank to fill that account for the 3 months capitol.
Did we do without checks? No. Did we get our hours cut so no one would have any chance of getting overtime? Yes. Did we lose any benefits? Yes, our Christmas bonus that year was only $50 instead of a certain dollar amount per each year of employment. Did the cutbacks effect everyone? Yes.
They didn't come out and tell everyone in a formal announcement, they let people know as they needed to know. They just said, to everyone, that there were too many dollars going out for the money coming in. That it would only take a few months to get everything on track again. To please be patient.
We were and by the next spring we were all back to full time with overtime and everything was pretty much back to normal.
So ask them what's going on. They may have bought a company that was circling the drain and they're trying to make sure they don't lose their money and make sure they don't lose their clients or employees.
So talk to them like a professional business person to an employer who needs to answer some important questions.