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Schedule II- Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2016
Valuation and Qualifying Accounts [Abstract]  
Schedule II- Valuation and Qualifying Accounts
SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS 
Description
Balance at
Beginning
of Period
 
Charged to
Costs and
Expenses
 
Charged to
Other
Accounts
 
Deductions
 
Balance at
End of
Period
Allowance for doubtful accounts:
 
 
 
 
 
 
 
 
 
Year ended December 31, 2016
$
322

 
$
205

 
$

 
$
(84
)
 
$
443

Year ended December 31, 2015
251

 
86

 

 
(15
)
 
322

Year ended December 31, 2014
200

 
142

 

 
(91
)
 
251

Warranty reserve:
 
 
 
 
 
 
 
 
 
Year ended December 31, 2016
$
314

 
$
621

 
$

 
$
(155
)
 
$
780

Year ended December 31, 2015
675

 
(62
)
 

 
(299
)
 
314

Year ended December 31, 2014
955

 
396

 

 
(676
)
 
675