Yes it is. But liquidity in terms of trading volume, not in terms of money the company has in the bank. Liquidity in terms of how many shares are traded each day. If you have shares in a private company, and you want to sell them, you’re going to have to arrange a private transaction, and rely on somebody elses valuation. Going public is one way of addressing that problem.
Doesn’t seem like they have any issues gaining liquidity.