Issuer Direct (ISDR) is a company that provides communication services to corporations to their shareholders, both public and private company, and they specialize in smaller companies.
As with many things, this communication has also increasingly been digitalized and ran over the internet, which has provided the company with building a nice little SaaS business, called Platform and Technology, which is now its biggest business and still growing (10-Q):
And here is how the company is structured (10-K):
The Services segment requires significant work for the client and involves hard (that is,