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Warranty Reserve (Tables)
3 Months Ended
Mar. 31, 2019
Guarantees And Product Warranties [Abstract]  
Summary of Warranty Reserve Activity Included in Accounts Payable and Accrued Liabilities within the consolidated balance sheets

The following table is a summary of warranty reserve activity which is included in ‘Accounts payable and accrued liabilities’ within the consolidated balance sheets:

 

 

 

Three Months Ended March 31,

 

 

 

2019

 

 

2018

 

Balance at beginning of period

 

$

195

 

 

$

258

 

Additions

 

 

18

 

 

 

16

 

Releases and/or charges incurred

 

 

(27

)

 

 

(47

)

Balance at end of period

 

$

186

 

 

$

227