Maybe they just figure it's not worth PRing every sale. They have been doing that for the last decade and what has it got them? Share price has never moved on a sale PR unless it was to Lockheed. So why waste the money? How many companies larger than, say, $100m market cap do you know that PR every sale? How many PR even 1/4 of their sales? How much information does a competitor get when Virtra PRs everything they do?
If I were you I would wait until earnings before deciding to sell. I guarantee you they have received sales in the last few months but are simply not PRing them.