Revenue Recognition (Tables)

3 Months Ended

Dec. 31, 2024

Revenue from Contract with Customer [Abstract]

Summary of Revenues Classified by Major Geographic Region

Revenues, classified by the major geographic region in which our customers are located, for the three months ended December 31, 2024 and 2023 (dollars in thousands):

	Three Months Ended December 31,
	2024		2023
Revenues:
United States	$	9,448	$	99,469
Other Americas		197		84
Germany		19,409		19,133
Other Europe, Middle East and Africa		5,543		4,775
Japan		5,957		5,623
Other Asia-Pacific		10,342		9,251
Total net revenues	$	50,896	$	138,335

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 September 30, 2024	$	22,219
Revenues recognized but not billed		7,782
Amounts reclassified to Accounts receivable, net		(11,384	)
Effect of foreign currency translation		(1,786	)
Balance as of December 31, 2024	$	16,831

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

	Deferred revenue
Balance as of September 30, 2024	$	167,176
Amounts billed but not recognized		20,430
Revenue recognized		(19,215	)
Effect of foreign currency translation		(7,321	)
Balance as of December 31, 2024	$	161,070

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, 2024 (dollars in thousands):

	Within One Year		Two to Five Years		Greater than Five Years		Total
Total revenue	$	72,853	$	90,877	$	32,139	$	195,869