Young bio's can easily spend their 1st 5 to 10 years in a perpetual state of R&D hoping to file a worthy ANDA or NDA that ultimately receives approval and gets relevantly commercialized with a partner.
So yes PMCB's still a young bio, as even 10+ year old Nasdaq bios ultimately fail to ever successfully commercialize anything in a relevant market penetration fashion, because bio start ups are attempting to penetrate a market dominated by the big boys.