Concentration of Credit Risk (Tables)

6 Months Ended

Jun. 30, 2016

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, 2016 and 2015 are as follows:

	Three Months Ended					Three Months Ended
	June 30, 2016					June 30, 2015
Customer	Net Sales		% of Net Sales			Net Sales		% of Net Sales
Customer A	$	3,607,000		25.5	%	$	4,041,000		29.7	%
Customer B	$	2,460,000		17.4	%	$	1,848,000		13.6	%

	Six Months Ended					Six Months Ended
	June 30, 2016					June 30, 2015
Customer	Net Sales		% of Net  Sales			Net Sales		% of Net  Sales
Customer A	$	8,772,000		29.9	%	$	8,404,000		29.4	%
Customer B	$	4,800,000		16.4	%	$	3,698,000		12.9	%