Revenue (Tables)

3 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

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

	Three months ended December 31,
($ in thousands)	2019		2018
North America, primarily the United States	$	47,536	$	46,335
Europe, Middle East & Africa	8,516		10,104
Rest of world	6,265		5,874
Total revenue	$	62,317	$	62,313

9. REVENUE (CONTINUED)

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

	Three months ended December 31,
($ in thousands)	2019		2018
Transferred at a point in time	$	56,300	$	57,463
Transferred over time	6,017		4,850
Total revenue	$	62,317	$	62,313

Contract with Customer, Asset and Liability

Changes in unearned revenue were:

($ in thousands)	Three months ended December 31, 2019
Unearned revenue, beginning of period	$	5,025
Billings	9,847
Revenue recognized	(8,070		)
Unearned revenue, end of period	$	6,802