Revenue Recognition (Tables)

12 Months Ended

Jan. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue by Region

The following table summarizes revenue by region based on the billing address of customers:

		Year Ended January 31,
		2020				2019				2018
		Amount		Percentage of Revenue		Amount		Percentage of Revenue		Amount		Percentage of Revenue
	(in thousands, except percentages)
Americas		$	500,622	81	%	$	270,132	82	%	$	125,428	83	%
APAC		51,152		8		27,720		8		13,652		9
EMEA		70,884		11		32,665		10		12,398		8
Total		$	622,658	100	%	$	330,517	100	%	$	151,478	100	%

Deferred Contract Acquisition Costs

The following table represents a rollforward of deferred contract acquisition costs:

	Year Ended January 31,
	2020		2019
	(in thousands)
Beginning balance	$	55,516	$	30,586
Additions to deferred contract acquisition costs	72,715		45,769
Amortization of deferred contract acquisition costs	(37,101)		(20,839)
Ending balance	$	91,130	$	55,516
Deferred contract acquisition costs, current (to be amortized in next 12 months)	$	44,885	$	26,453
Deferred contract acquisition costs, noncurrent	46,245		29,063
Total deferred contract acquisition costs	$	91,130	$	55,516