They raised $15m-$25m in the beginning of 2018, so 18 months now.
25 people on Linkedin seem to actually get paid by the company (live nearby, are not known to have been fired from the CEO position, not investors).
Assume an average cost (e.g. salary, rent, travel, everything) of $200-250K/year/employee (it's usually higher but they don't seem to be doing much, so probably on the low cost side), and get a yearly burn rate of $5-6m/year.
They used to have a bit more manpower, and used to seem to do more, so they probably burned $10m until now.
Which gives them 1 year's worth of money in the bank.
In the race between uBeam and Energous to be the first to run out of cash.... currently, I think, Energous has the lead, but it's a close call.
Go Energous go!.