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Accounts Receivable and Allowance for Doubtful Accounts (Tables)
 6 Months Ended
Jun. 30, 2016
Receivables [Abstract]  
Schedule of Changes in the Allowance for Doubtful Accounts

Changes in the allowance for doubtful accounts related to long-term receivables are presented below:

 

 

 

Six Months

 

 

 

 

 

 

 

Ended

 

 

Year Ended

 

 

 

June 30,

 

 

December 31,

 

 

 

2016

 

 

2015

 

Balance, Beginning of Period

 

$

—

 

 

$

392

 

Bad Debt Expense (Recovery)

 

 

625

 

 

 

(392

)

Balance, End of Period

 

$

625

 

 

$

—