Revenue Recognition (Tables)

3 Months Ended

Dec. 31, 2019

Revenue From Contract With Customer [Abstract]

Summary of Revenues Classified by Major Geographic Region

Through the evaluation of the discrete financial information that is reviewed by the chief operating decision maker (our chief executive officer), we have determined that we have one reportable segment.

Revenues, classified by the major geographic region in which our customers are located, for the three months ended December 31, 2019 and 2018 (dollars in thousands):

	Three Months Ended December 31,
	2019		2018
Revenues:
United States	$	35,041	$	38,064
Other Americas		8		354
Germany		20,217		13,716
Other Europe, Middle East and Africa		4,597		4,784
Japan		11,411		9,753
Other Asia-Pacific		6,185		5,813
Total net revenues	$	77,459	$	72,484

Summary of Significant Changes in Contract Assets and Deferred Revenue

The table below shows significant changes in contract assets (dollars in thousands):

	Contract assets
Balance as of October 1, 2019	$	9,219
Revenues recognized but not billed		19,524
Amounts reclassified to accounts receivable, net		(5,765	)
Balance as of December 31, 2019	$	22,978

The table below shows significant changes in deferred revenue (dollars in thousands):

	Deferred revenue
Balance as of October 1, 2019	$	353,284
Amounts billed but not recognized		31,663
Revenue recognized		(25,244	)
Balance as of December 31, 2019	$	359,703

Summary of Estimated Revenue Expected to be Recognized in Future Related to Performance Obligations Unsatisfied or Partially Unsatisfied

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied or partially unsatisfied at December 31, 2019 (dollars in thousands):

	Within One Year		Two to Five Years		Greater than Five Years		Total
Total revenue	$	156,695	$	155,875	$	98,423	$	410,993