'worker-owned' and 'worker cooperative' are not the same thing.
Re: small busineses... Many family businesses are 'worker-owned' but they are not 'worker cooperatives' because either:
- there's only a single worker, or
- the decisions are generally made by a single person (e.g. 'head of family')
Re: Bob's Red Mill... it has a board and a CEO etc. It doesn't seem to be a 'worker cooperative'.