That fully depends on what the losses are. I haven't read their financials, but if the losses are from expansion and other investment but their unit profitability is good, then it's not a problem. They can always pull back on investing in growth just to reap profits.
I want to see Lyft succeed just to counter Uber, but yeah, those numbers need to be healthier
[0] https://www.reuters.com/article/us-uber-results/uber-posts-5...