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Revenue Recognition (Tables)
 3 Months Ended
Jan. 02, 2021
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
Three Months Ended
January 2, 2021December 28, 2019
OEM Laser SourcesIndustrial Lasers & SystemsOEM Laser SourcesIndustrial Lasers & Systems
Net sales:
Products(1)
$125,577 $89,312 $109,836 $93,903 
Other product and service revenues(2)
85,585 25,579 91,112 25,920 
Total net sales$211,162 $114,891 $200,948 $119,823 
(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 $16.0 million and $14.4 million for the three months ended January 2, 2021 and December 28, 2019, respectively, were recognized over time.


Sales by market application and segment
Three Months Ended
January 2, 2021December 28, 2019
OEM Laser SourcesIndustrial Lasers & SystemsOEM Laser SourcesIndustrial Lasers & Systems
Net sales:
Microelectronics$128,173 $20,675 $114,893 $15,653 
Precision manufacturing11,859 69,591 10,395 77,977 
Instrumentation67,276 17,951 68,186 18,994 
Aerospace and defense3,854 6,674 7,474 7,199 
Total net sales$211,162 $114,891 $200,948 $119,823 
Contract with Customer, Contract Asset, Contract Liability, and Receivable
A rollforward of our customer deposits and deferred revenue are as follows (in thousands):
Three Months Ended
January 2, 2021December 28, 2019
Beginning balance (1)
$56,339 $42,550 
Additions to customer deposits and deferred revenue45,694 42,633 
Amount of customer deposits and deferred revenue recognized in income(42,081)(40,360)
Translation adjustments1,187 652 
Ending balance (2)
$61,139 $45,475 
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 of January 2, 2021 (in thousands):
Remainder of fiscal 2021ThereafterTotal
Performance obligations as of January 2, 2021
$45,524 $15,615 $61,139