Whatever happened to the Thirdrail Clothing Company?

They make some amazing clothes, but I can’t find anything about them. It seems that the Thirdrail brand clothes are slowly disappearing. I recently found a Thirdrail shirt in a store called D-tox, and I bought it right away, but I can’t find any online store or other stores that has any Thirdrail clothing. Did they go under? Did they shut down? Are they still making clothes?