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Product Warranties
 12 Months Ended
Dec. 31, 2019
Guarantees and Product Warranties [Abstract]  
Product Warranties
Product Warranties
We offer warranties on certain products and record a liability for the estimated future costs associated with warranty claims at the time revenue is recognized.  The warranty liability is based on historical experience, any specifically identified failures, and our estimate of future costs.

Product warranty liability activity for the year ended December 31, 2019 and 2018 was as follows (in thousands):
 
Year Ended December 31,
 
2019
 
2018
Product warranty liability, beginning
$
4,555

 
$
4,186

Warranty charges incurred, net
(2,382
)
 
(3,152
)
Provision for warranty charges, net of adjustments
811

 
3,521

Product warranty liability, ending
$
2,984

 
$
4,555

Less: current portion of product warranty liability
(1,683
)
 
(2,669
)
Non-current portion of product warranty liability
$
1,301

 
$
1,886