Photon ControlA company in a similar semiconductor space, also one that may offer analogies to PTK. I mention this company because some insider buying caught my attention last Sept:
https://www.canadianinsider.com/company?menu_tickersearch=PHO%20%7C%20Photon%20Control
Not massive buys, but look at what happened to the share price very soon following these purchases on the open market. Just a coincidence I'm sure. Feet firmly planted in reality.