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Revenue Recognition (Tables)
 12 Months Ended
Oct. 03, 2020
Revenue from Contract with Customer [Abstract]  
Summary of Revenue from Contracts with Customers
The following tables summarize revenue from contracts with customers (in thousands):
Sales by revenue type and segment
Fiscal
202020192018
OEM Laser SourcesIndustrial Lasers & SystemsOEM Laser SourcesIndustrial Lasers & SystemsOEM Laser SourcesIndustrial Lasers & Systems
Net sales:
Products(1)
$441,476 $369,342 $532,863 $430,878 $890,591 $512,818 
Other product and service revenues(2)
317,453 100,728 353,813 113,086 368,886 130,278 
Total net sales$758,929 $470,070 $886,676 $543,964 $1,259,477 $643,096 
(1) Net sales primarily recognized at a point in time.
(2) Includes sales of spare parts, related accessories, and other consumable parts as well as revenues from service agreements, of which $62.4 million for fiscal 2020 was recognized over time.

Sales by market application and segment
Fiscal
202020192018
OEM Laser SourcesIndustrial Lasers & SystemsOEM Laser SourcesIndustrial Lasers & SystemsOEM Laser SourcesIndustrial Lasers & Systems
Net sales:
Microelectronics$466,780 $71,755 $568,387 $63,789 $951,166 $85,188 
Materials processing36,129 299,621 38,017 366,861 46,467 474,437 
OEM components and instrumentation158,748 89,799 163,095 103,693 140,616 80,207 
Scientific and government programs97,272 8,895 117,177 9,621 121,228 3,264 
Total net sales$758,929 $470,070 $886,676 $543,964 $1,259,477 $643,096 
Summary of Customer Deposits and Deferred Revenue
A rollforward of our customer deposits and deferred revenue are as follows (in thousands):
Fiscal
20202019
Beginning balance$42,550 $55,637 
Amount of customer deposits and deferred revenue recognized in income(171,521)(189,318)
Additions to customer deposits and deferred revenue183,604 177,753 
Translation adjustments1,706 (1,522)
Ending balance$56,339 $42,550 
Summary of Estimated Revenue Expected to be Recognized in the Future The following table includes estimated revenue expected to be recognized in the future related to performance obligations for sales of maintenance agreements, extended warranties, installation, and contracts with customer acceptance provisions included in customer deposits and deferred revenue as follows (in thousands):
1 yearThereafterTotal
Performance obligations as of September 28, 2019$34,538 $8,012 $42,550 
Performance obligations as of October 3, 202042,715 13,624 56,339