Revenue (Tables)

6 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table summarizes our revenue by geographic location of our customers (in thousands):

	Three months ended March 31,				Six months ended March 31,
	2021		2020		2021		2020
North America, primarily the United States	$	56,423	$	57,374	$	110,441	$	104,910
Europe, Middle East & Africa	11,690		9,885		22,226		18,401
Rest of world	9,188		6,188		17,780		12,453
Total revenue	$	77,301	$	73,447	$	150,447	$	135,764

The following table summarizes our revenue by the timing of revenue recognition (in thousands):

	Three months ended March 31,				Six months ended March 31,
	2021		2020		2021		2020
Transferred at a point in time	$	69,144	$	66,765	$	133,332	$	123,065
Transferred over time	8,157		6,682		17,115		12,699
Total revenue	$	77,301	$	73,447	$	150,447	$	135,764

Contract with Customer, Asset and Liability

Changes in unearned revenue were (in thousands):

	Three months ended March 31,				Six months ended March 31,
	2021		2020		2021		2020
Unearned revenue, beginning of period	$	13,066	$	6,802	$	9,341	$	5,025
Billings	13,746		9,706		28,013		19,553
Revenue recognized	(10,376)		(7,806)		(20,918)		(15,876)
Unearned revenue, end of period	$	16,436	$	8,702	$	16,436	$	8,702