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Guarantees
3 Months Ended
Mar. 31, 2017
Guarantees [Abstract]  
Guarantees
Guarantees

We provide warranties on certain of our products at the time of sale and sell extended warranties. The standard warranty period for our capital and reusable equipment is generally one year and our extended warranties can vary in length. Liability under service and warranty policies is based upon a review of historical warranty and service claim experience. Adjustments are made to accruals as claim data and historical experience warrant.

Changes in the carrying amount of service and product warranties for the three months ended March 31, are as follows:

 
2017
 
2016
Balance as of January 1,
$
1,954

 
$
2,509

 
 
 


Provision for warranties
777

 
833

 
 
 


Claims made
(906
)
 
(841
)
 
 
 


Balance as of March 31,
$
1,825

 
$
2,501