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Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2017
Commitments And Contingencies [Abstract]  
Schedule of Changes in Warranty Reserves

Changes in the Company’s warranty reserves are as follows:

 

 

 

Nine Months Ended September 30,

 

 

 

2017

 

 

2016

 

Balance, beginning of the period

 

$

1,788

 

 

$

1,894

 

Accruals

 

 

2,511

 

 

 

2,076

 

Usage

 

 

(2,025

)

 

 

(1,958

)

Balance, end of the period

 

$

2,274

 

 

$

2,012