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Deferred Warranty Revenue and Warranty Reserve (Tables)
 12 Months Ended
Dec. 31, 2016
Guarantees [Abstract]  
Deferred Warranty Revenue

Deferred warranty revenue at December 31, 2016 will be recognized as revenue as follows:

 

Year    Amount  

2017

    $ 22  

2018

      12  

2019

      3  
  

 

 

  
Total    $ 37  
  

 

 

  
Schedule of Warranty Activity

Activity in the warranty reserve account during the three years ended December 31, 2016 was as follows:

 

     For the years ended December 31,  
         2016              2015              2014      

Balance, beginning of period

    $ 43      $ 85      $ 116  

Provision for warranty claims

      165        165        173  

Product or cash issued to settle claims

      (55 )       (207 )       (204 ) 
  

 

 

     

 

 

     

 

 

  

Balance, end of period

    $ 153      $ 43      $ 85