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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2015
Commitments and Contingencies [Abstract]  
Product warranty accrued liability
The following table reflects the change in our warranty accrual which is included in “accrued liabilities” on the condensed consolidated balance sheets, during the three months ended March 31, 2015 and 2014 (in thousands):

  
ThreeMonthsEnded
March31,
 
  
2015
  
2014
 
     
Beginning accrued warranty and related costs
 
$
802
  
$
1,048
 
Accruals for warranties issued
  
174
   
496
 
Adjustments related to pre-existing warranties including expirations and changes in estimates
  
(294
)
  
(103
)
Cost of warranty repair
  
(290
)
  
(214
)
Ending accrued warranty and related costs
 
$
392
  
$
1,227
 
 
Outstanding contractual obligations
Outstanding contractual obligations as of March 31, 2015 are summarized as follows (in thousands):

  
Paymentsduebyperiod
 
Contractual Obligations
 
Total
  
Lessthan1year
  
1-3
years
  
4-5
years
  
Morethan
5years
 
Operating leases
 
$
690
  
$
236
  
$
289
  
$
54
  
$
111
 
Royalty agreement
  
2,325
   
744
   
1,150
   
431
   
—
 
Total
 
$
3,015
  
$
980
  
$
1,439
  
$
485
  
$
111