Revenue

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

We disaggregate revenue from contracts with customers into three revenue categories: (i) product revenues, (ii) rental revenues and (iii) field service and other revenues. We have predominately domestic operations, with a small amount of sales in Australia, the Kingdom of Saudi Arabia and other international markets. For the year ended December 31, 2022, we derived 66% of our total revenues from the sale of our products, 14% of our total revenues from rental and 20% of our total revenues from field service and other. This compares to 64% of our total revenues from the sale of our products, 14% of our total revenues from rental and 22% of our total revenues from field service and other for the year ended December 31, 2021.  In 2020, we derived 59% of our total revenues from the sale of our products, 19% from rental and 22% from field service and other. The following table presents our revenues disaggregated by category:

	Year Ended December 31,
	2022		2021		2020
Product revenue	$	452,615	$	280,907	$	206,801
Rental revenue	100,453		61,629		66,169
Field service and other revenue	135,301		96,053		75,596
Total revenue	$	688,369	$	438,589	$	348,566

At December 31, 2022, we had a deferred revenue balance of $1.5 million compared to the December 31, 2021 balance of $1.8 million included in accrued expenses and other current liabilities in the consolidated balance sheets. Deferred revenue represents our obligation to transfer products or perform services for a customer for which we have received cash or billed in advance. The revenue that has been deferred will be recognized upon product delivery or as services are performed. As of December 31, 2022, we did not have any contracts with an original length of greater than a year from which revenue is expected to be recognized in the future related to performance obligations that are unsatisfied.