Concentration of Credit Risk (Tables)

6 Months Ended

Jun. 30, 2015

Risks and Uncertainties [Abstract]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

Sales to these customers for the three and six months ended June 30, 2015 and 2014 are as follows:

	Three Months Ended				Three Months Ended
	June 30, 2015				June 30, 2014
			% of Net				% of Net
Customer	Net Sales		Sales		Net Sales		Sales
Customer A	$	4,041,000	29.7	%	$	3,703,000		28.1	%
Customer B	$	1,848,000	13.6	%	$	1,379,000		10.5	%

	Six Months Ended				Six Months Ended
	June 30, 2015				June 30, 2014
			% of Net				% of Net
Customer	Net Sales		Sales		Net Sales		Sales
Customer A	$	8,404,000	29.4	%	$	7,930,000		28.2	%
Customer B	$	3,698,000	12.9	%	$	3,163,000		11.3	%