In Fiscal Year 2018, they had positive operating cash flow of $2.1 billion. Part of the reason for the difference between accounting earnings (a loss) and actual cash flow is the huge depreciation charges ($1.9 billion) for historical capital expenditures, versus present-day cash outflows.

In that year, Tesla still spent a lot of cap-ex dollars on Model 3 capacity and battery capacity (to the tune of $2.3 billion), so overall cash flow was slightly negative - about $200 million for the year, off of $21 billion in revenue.

In the six months since then, they're reported additional positive operating cash flow: $224mm off of $10.9 billion in revenue.

This is a company experiencing 47% y/y revenue growth for the first half of the year. Yes, they're spending on cap-ex, but they are producing positive operating cash flow and their total operating+cap-ex cash flow is running a little in the red, but <1% of revenues.

And in context, they have $5 billion in cash and $10 billion in short term assets.

Tesla is not at significant financial risk.