5. Revenue

Disaggregation of Revenue

Revenue by geographic region, based on the physical location of the customer, is (in thousands):

	Three Months Ended March 31,
	2018			2017
				*As Adjusted
United States	$	39,307		$	30,554
Foreign		8,684			3,918
Total revenue	$	47,991		$	34,472
Percentage of revenue generated outside of the United States		18	%		11	%

*See Note 1 for a summary of adjustments

Deferred Revenue and Performance Obligations

During the three months ended March 31, 2018, 80% to 90% of revenue recognized was included in our deferred revenue balance at the beginning of the period.

Transaction Price Allocated to the Remaining Performance Obligations

As of March 31, 2018, approximately $382 million of revenue is expected to be recognized from remaining performance obligations. We expect to recognize revenue on approximately 70% of these remaining performance obligations over the next 24 months, with the balance recognized thereafter.