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Accounts Receivable
 12 Months Ended
Dec. 31, 2018
Receivables [Abstract]  
Accounts Receivable
Accounts Receivable

Accounts receivable and the related allowance for doubtful accounts are as follows:
 
 
December 31,
 
2018
 
2017
 
(in thousands)
Accounts receivable
$
54,342

 
$
50,457

Less:  Allowance for doubtful accounts
(264
)
 
(119
)
     Total, net
$
54,078

 
$
50,338


 
 
Years Ending December 31,
 
2018
 
2017
 
2016
Allowance for doubtful accounts:
(in thousands)
Balance, beginning of period
$
119

 
$
90

 
$
115

Provisions for losses on accounts receivable, net of adjustments
174

 
179

 
(25
)
Accounts receivable written off, net of recoveries
(29
)
 
(150
)
 
—

Balance, end of period
$
264

 
$
119

 
$
90