Charted: Ay, ca-Roomba!

The maker of Roomba robot vacuum cleaners needs to clean up its act.

Zoom in: iRobot today warned that it may not survive on its own.

• "Our history of operating losses and negative cash flows from operations has raised substantial doubt about our ability to continue as a going concern," the company said in an SEC filing.

Flashback: The warning comes about 14 months after iRobot's $1.4 billion deal to sell itself to Amazon collapsed amid opposition from European regulators.

By the numbers: The company's Q4 revenue, released today, plunged 44% from a year earlier to $172 million as Roomba sales plummeted.

• It led to a net loss of $77 million for the quarter, driving iRobot shares down over 35% today.

State of play: iRobot has cut more than half of its employees since the Amazon deal fell apart.

• The company has also reduced its marketing costs, slashed inventory and cut product development expenses.

What's next: The company is weighing a possible sale, debt refinancing or "strategic transaction."