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Schedule II Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure
SCHEDULE II
VALUATION AND QUALIFYING ACCOUNTS
(in thousands)
Allowance for doubtful accounts receivable
 
Balance at beginning of period
 
Charged to cost and expenses
 
Write-offs, net of recoveries
 
Balance at end of period
Year ended December 31, 2013
 
$
20

 
$

 
$

 
$
20

Year ended December 31, 2014
 
20

 
566

 

 
586

Year ended December 31, 2015
 
$
586

 
$
1,342

 
$
93

 
$
2,021