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Revenue Recognition (Tables)
 9 Months Ended
Jul. 04, 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
Three Months Ended
July 4, 2020June 29, 2019
OEM Laser SourcesIndustrial Lasers & SystemsOEM Laser SourcesIndustrial Lasers & Systems
Net sales:
Products(1)
$109,995  $91,114  $115,992  $104,784  
Other product and service revenues(2)
74,699  22,522  90,293  28,101  
Total net sales$184,694  $113,636  $206,285  $132,885  
(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 $15.4 million and $14.1 million for the three months ended July 4, 2020 and June 29, 2019, respectively, were recognized over time.
Nine Months Ended
July 4, 2020June 29, 2019
OEM Laser SourcesIndustrial Lasers & SystemsOEM Laser SourcesIndustrial Lasers & Systems
Net sales:
Products(1)
$321,691  $277,710  $412,629  $329,537  
Other product and service revenues(2)
237,673  75,174  267,601  85,409  
Total net sales$559,364  $352,884  $680,230  $414,946  

(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 $46.3 million and $40.1 million for the nine months ended July 4, 2020 and June 29, 2019, respectively, were recognized over time.
Sales by market application and segment
Three Months Ended
July 4, 2020June 29, 2019
OEM Laser SourcesIndustrial Lasers & SystemsOEM Laser SourcesIndustrial Lasers & Systems
Net sales:
Microelectronics$123,635  $18,207  $126,754  $16,467  
Materials processing7,581  74,156  11,207  90,198  
OEM components and instrumentation33,588  19,903  39,997  24,300  
Scientific and government programs19,890  1,370  28,327  1,920  
Total net sales$184,694  $113,636  $206,285  $132,885  

Nine Months Ended
July 4, 2020June 29, 2019
OEM Laser SourcesIndustrial Lasers & SystemsOEM Laser SourcesIndustrial Lasers & Systems
Net sales:
Microelectronics$343,429  $50,726  $441,597  $49,298  
Materials processing26,373  230,043  29,493  281,477  
OEM components and instrumentation120,502  65,903  119,027  78,825  
Scientific and government programs69,060  6,212  90,113  5,346  
Total net sales$559,364  $352,884  $680,230  $414,946  
Summary of Customer Deposits and Deferred Revenue
A rollforward of our customer deposits and deferred revenue is as follows (in thousands):
Beginning balance, September 28, 2019 (1)
$42,550  
Additions to customer deposits and deferred revenue137,747  
Amount of customer deposits and deferred revenue recognized in income (2)
(126,501) 
Translation adjustments260  
Ending balance, July 4, 2020 (3)
$54,056  

(1) Beginning customer deposits and deferred revenue as of September 28, 2019 include $34,538 of current portion and $8,012 of long-term portion.

(2) Amount of customer deposits and deferred revenue recognized in the three months ended July 4, 2020 was $48,674.
        
(3) Ending customer deposits and deferred revenue as of July 4, 2020 include $41,329 of current portion and $12,727 of long-term portion.
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 July 4, 2020 (in thousands):
Remainder of fiscal 2020ThereafterTotal
Performance obligations as of July 4, 2020$27,120  $26,936  $54,056