It says that the company is a law firm, that only two of the four co-founders are lawyers, and that it raised $10.5 million dollars, presumably on an equity basis.
However, law firms are not permitted to have non-lawyers as owners. It is considered unethical as it would mean decisions would be made by people that aren't obligated to follow the cannons of legal ethics or subject to bar discipline. The only U.S. jurisdiction I'm aware of that doesn't follow this rule is the District of Columbia, but Atrium is based in California.