Revenue (Tables)

3 Months Ended

Dec. 28, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

We disaggregate our revenue by reportable segment, sales type (product or service), the timing of recognition of revenue for transfer of goods or services to customers (point-in-time or over time), and geographic market based on the billing location of the customer. See Note 14 for further information on our reportable segments and intersegment revenue.

	Three Months Ended December 28, 2019
	Test & Simulation		Sensors		Intersegment			Total
Sales type
Product	$	95,496	$	83,774	$	(412	)	$	178,858
Service	25,234		1,761		(10		)	26,985
Total revenue	$	120,730	$	85,535	$	(422	)	$	205,843
Timing of recognition
Point-in-time	$	60,104	$	77,163	$	(422	)	$	136,845
Over time	60,626		8,372		—			68,998
Total revenue	$	120,730	$	85,535	$	(422	)	$	205,843
Geographic market
Americas	$	37,848	$	46,545	$	(422	)	$	83,971
Europe	26,515		22,542		—			49,057
Asia	56,367		16,448		—			72,815
Total revenue	$	120,730	$	85,535	$	(422	)	$	205,843

	Three Months Ended December 29, 2018
	Test & Simulation		Sensors		Intersegment			Total
Sales type
Product	$	98,907	$	76,500	$	(329	)	$	175,078
Service	26,653		1,450		—			28,103
Total revenue	$	125,560	$	77,950	$	(329	)	$	203,181
Timing of recognition
Point-in-time	$	79,619	$	77,950	$	(329	)	$	157,240
Over time	45,941		—		—			45,941
Total revenue	$	125,560	$	77,950	$	(329	)	$	203,181
Geographic market
Americas	$	39,489	$	37,729	$	(329	)	$	76,889
Europe	28,627		25,348		—			53,975
Asia	57,444		14,873		—			72,317
Total revenue	$	125,560	$	77,950	$	(329	)	$	203,181

Contract Assets and Contract Liabilities

Significant changes in contract assets and contract liabilities are as follows:

	Contract Assets
Balance, September 28, 2019	$	80,331
Changes in estimated stage of completion	29,500
Transfers to accounts receivable, net	(41,635		)
Other	(828		)
Balance, December 28, 2019	$	67,368
	Contract Liabilities
Balance, September 28, 2019	$	81,045
Revenue recognized included in balance at beginning of period	(33,485		)
Increases due to payments received, excluding amounts recognized as revenue during period	27,111
Other	(813		)
Balance, December 28, 2019	$	73,858

Contract assets and contract liabilities are as follows:

	December 28, 2019		September 28, 2019
Contract assets	$	67,368	$	80,331
Contract liabilities	73,858		81,045