Washington, DC (CNN) Lime, the world's largest scooter sharing company, is pulling out of 12 markets and laying off staff as it struggles to become profitable.

In the US, Lime will exit Atlanta, Phoenix, San Diego and San Antonio. Overseas, it's pulling out of cities including Bogota, Lima and Rio de Janeiro.

Lime is eliminating 14% of its full-time employees worldwide, which will impact about 100 people, according to the company. Lime declined to say how many part-timers will be affected.

The company said it was struggling to turn a profit amid low ridership, and that it is facing regulatory challenges in some of these markets, including bans on nighttime riding and high fees to operate.

"We have shifted our primary focus to profitability," CEO Brad Bao said in a blog post . "While the vast majority of our 120+ markets have adopted micromobility transportation solutions quickly and are profitable, there are select communities throughout the world where micromobility has evolved more slowly."