Fast-casual restaurant chain Cosi Inc. and its subsidiaries filed for bankruptcy in Boston on Wednesday. The company, famous for its homemade flatbread, listed assets of $31.24 million and liabilities of about $20 million in its Chapter 11 petition.

Boston-based Cosi is being advised in its bankruptcy case by Mirick, O’Connell, DeMallie & Lougee, a firm based in Westborough, Massachusetts that celebrated its 100th anniversary this summer. In bankruptcy papers, Cosi also lists a nearly $147,000 debt to New York’s oldest firm.