The low-cost airline filed for bankruptcy protection Monday. It will continue to operate as it seeks to restructure its debt.

Years of losses and two failed mergers have caused the ultra-low-cost carrier’s stock price to tumble 92% in the past year. But Spirit says it will bounce back.

Here’s what you need to know about the future of the air travel provider after it filed for bankruptcy protection on Monday, along with its track record of financial difficulties.