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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Changes in Reserve for Product Warranty Claim Costs
Changes in the liability for product warranty claim costs were as follows: 
 
Year Ended December 31,
(In thousands)
2015
 
2014
 
2013
Balance at beginning of period
$
353

 
$
41

 
$
404

Accruals for warranties issued during the period
23

 
1,178

 
416

Settlements (in cash or in kind) during the period
(341
)
 
(866
)
 
(779
)
Balance at end of period
$
35

 
$
353

 
$
41