Will Webroot work on a computer without internet access

I have a client that has a few workstations that live not connected to the internet.  We connect them periodically (once a month) to apply updates etc, but they stay disconnected most of the time.   They do get files added to them every couple of days via local network or through USB drive.  So I would like to make sure they have protection still.  Most new AV's use the cloud for scanning and those solutions wont work.  Will Webroot work under this scenario for daily scans.  We use it on the rest of the workstations but they are all connected to the internet.