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Note 9 - Product Warranty Obligations
 12 Months Ended
Dec. 31, 2017
Notes to Financial Statements  
Product Warranty Disclosure [Text Block]
9.
Product Warranty Obligations
 
The Company records a liability for product warranty obligations at the time of sale to a customer based upon historical warranty experience. The Company also records a liability for specific warranty matters when they become known and are reasonably estimable.
Additionally, the Company sells extended warranty coverage for certain products. The sales of extended warranties are recorded as deferred revenue, which is recognized over the life of the contracts following the standard warranty period.
 
The following is a tabular reconciliation of the product warranty liability,
excluding the deferred revenue related to our extended warranty coverage:
 
   
Year Ended December 31
,
  
   
201
7
    
201
6
    
201
5
  
Balance at beginning of perio
d
   $
31,695
     $
30,197
     $
30,909
  
Product warranty reserve assumed in acquisitio
n
    
43
      
840
      
351
  
Payment
s
    
(18,861
 )    
(18,691
 )    
(21,686
 )
Provision for warranty issue
d
    
21,347
      
19,148
      
20,823
  
Changes in estimates for pre-existing warrantie
s
    
1,198
      
201
      
(200
 )
Balance at end of perio
d
   $
35,422
     $
31,695
     $
30,197
  
 
The following is a tabular reconciliation of the deferred revenue related to extended warranty coverage
:
 
   
Year Ended December 31
,
  
   
201
7
    
201
6
    
201
5
  
Balance at beginning of perio
d
   $
31,080
     $
28,961
     $
27,193
  
Deferred revenue contracts assumed in acquisitio
n
    
-
      
-
      
291
  
Deferred revenue contracts issued (1
)
    
27,107
      
7,733
      
5,978
  
Amortization of deferred revenue contract
s
    
(7,246
 )    
(5,614
 )    
(4,501
 )
Balance at end of perio
d
   $
50,941
     $
31,080
     $
28,961
  
 
 
(
1
)
The increase in deferred revenue contracts issued
during
2017
was largely due to the launch of a post-sale extended warranty program.
 
Product warranty obligations and extended warranty
related deferred revenues are included in the balance sheets as follows:
 
   
December 31,
  
   
201
7
    
201
6
  
Product warranty liabilit
y
                
Current portion - other accrued liabilitie
s
   $
20,576
     $
20,763
  
Long-term portion - other long-term liabilitie
s
    
14,846
      
10,932
  
Tota
l
   $
35,422
     $
31,695
  
                 
Deferred revenue related to extended warrantie
s
                
Current portion - other accrued liabilitie
s
   $
10,002
     $
6,728
  
Long-term portion - other long-term liabilitie
s
    
40,939
      
24,352
  
Tota
l
   $
50,941
     $
31,080