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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Allowance for Doubtful Accounts (Tables)
12 Months Ended
Dec. 31, 2016
Allowance for Doubtful Accounts [Table Text Block]

The following table sets forth the activity in the allowance for doubtful accounts for the years ended December 31, 2016, 2015 and 2014 (in thousands):
 
Year Ended December 31,
 
2016
 
2015
 
2014
Allowance for doubtful accounts  beginning of year
$
643

 
$
1,182

 
$
1,444

Bad debt (recovery) expense
886

 
(23
)
 
(143
)
Reduction in allowance for doubtful accounts
(772
)
 
(516
)
 
(119
)
Allowance for doubtful accounts  end of year
$
757

 
$
643

 
$
1,182