When you value something you need to find something as similar as possible to get that value. In terms of TLRY my stock of choice for a compatible is Canopy Growth, but why ?
Canopy and Tilray have string alignment in terms of key markets, product offerings and production size. Is it perfectly matching TLRY, no, but it's the closest I can find. TLRY reports in USD while Canopy reports in CDN so that too needs to be considered when comparing sales, expenses, assets etc
This method is very similar to how the bank sets the value of your home. In this case they compare number of bedrooms, square footage, land size etc. the value of similar homes that sold is used to set the value of yours (adjusted on $$ per square foot etc).
No one ever said the markets were easy, it does require some effort / research