Uber Technologies is raking in ever increasing amounts of revenue, but it remains unclear how the company will change the balance of its earnings and costs in order to become profitable.

The company doubled its 2016 bookings over the previous year, according to a report from Bloomberg that Uber confirmed with TheStreet.

While the figures did not extend to the first quarter of this year, they indicated that last year the company had revenue of $6.5 billion and a loss of $2.8 billion -- exclusive of revenue from Uber's business in China that has been discontinued.

While Uber's revenue growth is impressive, investors remain uncertain whether the company can pull out of its money-losing nosedive and rise Phoenix-like from a run of losses such as Amazon (AMZN) - Get Report did.

The financial disclosure comes as Uber is searching for a chief operating officer to help co-founder and CEO Travis Kalanick manage the company. It also follows the resignations of several high-ranking executives and allegations of sexual harassment at the San Francisco-based company. The company is also embroiled in a costly lawsuit over allegations that a self-driving car company Uber acquired stole trade secrets from Alphabet/Google's (GOOGL) - Get Report Waymo.

Even with its problems, privately held Uber, which has a valuation of nearly $60 billion, continues to be the leader of the ride-sharing industry as well as the bane of traditional cab services.

"The company said it's pleased to see revenue growth far exceeding losses last year and that its business is still performing well this year even as it faces unyielding controversy" Bloomberg reported.

"Uber declined to report first-quarter numbers, saying they were in line with expectations but that the company hasn't yet presented them to investors," the news service added.