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Commitments And Contingencies (Tables)
 12 Months Ended
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Changes In Carrying Amount Of Warranty Liabilities
The changes in the carrying amount of warranty liabilities for each of the past three years were as follows:
Year Ended December 31
2019
 
2018
 
2017
Beginning balance
$
480

 
$
467

 
$
474

Warranty expense
258

 
129

 
146

Payments
(105
)
 
(102
)
 
(123
)
Adjustments
(14
)
 
(14
)
 
(30
)
Ending balance
$
619

 
$
480

 
$
467