Revenue (Tables)

9 Months Ended

Jun. 27, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

We disaggregate our revenue by reportable segment, sales type (product or service), 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
	June 27, 2020									June 29, 2019
	Test & Simulation		Sensors		Intersegment			Total		Test & Simulation		Sensors		Intersegment			Total
Sales type
Product	$	96,870	$	78,739	$	(386	)	$	175,223	$	123,573	$	82,305	$	(350	)	$	205,528
Service	19,534		1,483		(15		)	21,002		24,755		1,926		—			26,681
Total revenue	$	116,404	$	80,222	$	(401	)	$	196,225	$	148,328	$	84,231	$	(350	)	$	232,209
Timing of recognition
Point-in-time	$	60,792	$	72,031	$	(401	)	$	132,422	$	95,247	$	77,978	$	(350	)	$	172,875
Over time	55,612		8,191		—			63,803		53,081		6,253		—			59,334
Total revenue	$	116,404	$	80,222	$	(401	)	$	196,225	$	148,328	$	84,231	$	(350	)	$	232,209
Geographic market
Americas	$	32,821	$	42,000	$	(401	)	$	74,420	$	47,892	$	42,365	$	(350	)	$	89,907
Europe	36,951		19,851		—			56,802		34,137		26,994		—			61,131
Asia	46,632		18,371		—			65,003		66,299		14,872		—			81,171
Total revenue	$	116,404	$	80,222	$	(401	)	$	196,225	$	148,328	$	84,231	$	(350	)	$	232,209
	Nine Months Ended
	June 27, 2020									June 29, 2019
	Test & Simulation		Sensors		Intersegment			Total		Test & Simulation		Sensors		Intersegment			Total
Sales type
Product	$	294,654	$	243,674	$	(1,024	)	$	537,304	$	348,992	$	239,345	$	(1,040	)	$	587,297
Service	67,977		8,281		(31		)	76,227		75,928		5,211		—			81,139
Total revenue	$	362,631	$	251,955	$	(1,055	)	$	613,531	$	424,920	$	244,556	$	(1,040	)	$	668,436
Timing of recognition
Point-in-time	$	178,512	$	226,730	$	(1,055	)	$	404,187	$	273,226	$	231,507	$	(1,040	)	$	503,693
Over time	184,119		25,225		—			209,344		151,694		13,049		—			164,743
Total revenue	$	362,631	$	251,955	$	(1,055	)	$	613,531	$	424,920	$	244,556	$	(1,040	)	$	668,436
Geographic market
Americas	$	110,044	$	133,393	$	(1,055	)	$	242,382	$	138,780	$	119,069	$	(1,040	)	$	256,809
Europe	104,601		68,560		—			173,161		92,300		79,995		—			172,295
Asia	147,986		50,002		—			197,988		193,840		45,492		—			239,332
Total revenue	$	362,631	$	251,955	$	(1,055	)	$	613,531	$	424,920	$	244,556	$	(1,040	)	$	668,436

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	94,646
Transfers to accounts receivable, net	(88,566		)
Acquisitions1	6,107
Other	(731		)
Balance, June 27, 2020	$	91,787
	Contract Liabilities
Balance, September 28, 2019	$	81,045
Revenue recognized included in balance at beginning of period	(52,176		)
Increases due to payments received, excluding amounts recognized as revenue during period	44,871
Acquisitions1	3,182
Other	(1,271		)
Balance, June 27, 2020	$	75,651

¹    See Note 16 for additional information regarding acquisitions.

Contract assets and contract liabilities are as follows:

	June 27, 2020		September 28, 2019
Contract assets	$	91,787	$	80,331
Contract liabilities	75,651		81,045