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Warranty Reserve (Tables)
3 Months Ended
Mar. 31, 2018
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:

 

    

March 31,

     December 31,  
     2018      2017  

Balance at beginning of period

   $ 258      $ 287  

Additions

     16        178  

Releases and/or charges incurred

     (47      (207
  

 

 

    

 

 

 

Balance at end of period

   $ 227      $ 258