Revenue (Tables)

12 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following summarizes our revenue by geographic location of our customers:

	Fiscal year ended September 30,
($ in thousands)	2020		2019		2018
North America, primarily the United States	$	213,487	$	184,022	$	161,924
Europe, Middle East & Africa	40,076		39,896		39,211
Rest of world	25,708		30,285		25,758
Total revenue	$	279,271	$	254,203	$	226,893

The following summarizes our revenue by the timing of revenue recognition:

	Fiscal year ended September 30,
($ in thousands)	2020		2019		2018
Transferred at a point in time	$	253,371	$	231,387	$	212,448
Transferred over time	25,900		22,816		14,445
Total revenue	$	279,271	$	254,203	$	226,893

Contract with Customer, Asset and Liability

Changes in unearned revenue were:

	Fiscal year ended September 30,
($ in thousands)	2020
Unearned revenue, beginning of period	$	5,025
Billings	35,213
Revenue recognized	(30,897)
Unearned revenue, end of period	$	9,341