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Product Warranties (Tables)
 3 Months Ended
Mar. 31, 2017
Product Warranties Disclosures [Abstract]  
Schedule of rollforward of the accrued warranties

The following table provides a rollforward of the accrued warranties (in thousands):

 

 

 

Three Months Ended March 31,

 

 

 

2017

 

 

2016

 

Beginning balance as of January 1

 

$

1,378

 

 

$

1,332

 

Payments made during the period

 

 

—

 

 

 

(4

)

Changes in accrual related to warranties issued during the period

 

 

51

 

 

 

16

 

Changes in accrual related to pre-existing warranties

 

 

6

 

 

 

(1

)

Balance as of March 31

 

$

1,435

 

 

$

1,343