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Allowance for Doubtful Accounts, Sales Returns and Discounts
 12 Months Ended
Dec. 31, 2015
Allowance For Doubtful Accounts Sales Returns And Discounts [Abstract]  
Allowance For Doubtful Accounts Sales Returns and Discounts [Text Block]
Note 5.
Allowance for Doubtful Accounts, Sales Returns and Discounts
 
The activity in the allowance for doubtful accounts, sales returns and discounts for the years ended December 31, 2013, 2014 and 2015 is as follows:
 
Allowance for doubtful accounts
 
 
 
Balance at
 
 
 
 
 
Balance at
 
 
 
beginning
 
Charges to
 
Amounts
 
end of
 
Period
 
of year
 
earnings
 
utilized
 
year
 
 
 
(in thousands)
 
 
 
 
 
 
 
 
 
 
 
Year 2013
 
$
15,186
 
 
173
 
 
-
 
 
15,359
 
Year 2014
 
$
15,359
 
 
554
 
 
(15,186)
 
 
727
 
Year 2015
 
$
727
 
 
310
 
 
(262)
 
 
775
 
 
Allowance for sales returns and discounts
 
 
 
Balance at
 
 
 
 
 
Balance at
 
 
 
beginning
 
 
 
Amounts
 
end of
 
Period
 
of year
 
Additions
 
utilized
 
year
 
 
 
(in thousands)
 
 
 
 
 
 
 
 
 
 
 
Year 2013
 
$
1,078
 
 
7,272
 
 
(7,421)
 
 
929
 
Year 2014
 
$
929
 
 
5,168
 
 
(5,229)
 
 
868
 
Year 2015
 
$
868
 
 
8,887
 
 
(8,982)
 
 
773