Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Table Text Block]

			(in thousands, except per share data)
2016 Quarters:	First			Second		Third		Fourth
Net Sales	$	11,683		$	12,053	$	11,036	$	9,802
Gross profit		2,541			2,062		1,835		1,976
Net loss	$	(1,485)		$	(1,392)	$	(2,080)	$	(301)	(1)
Net loss per share:
Basic	$	(.10)		$	(.10)	$	(.15)	$	(.02)
Diluted	$	(.10)		$	(.10)	$	(.15)	$	(.02)

2015 Quarters:	First			Second			Third		Fourth
Net Sales	$	14,672		$	15,133		$	13,760	$	13,799
Gross profit		2,983			3,839			3,410		3,453
Net income from continuing operations		2,773	(1)		1,268	(1)		391		919	(1)
Net (loss) income from discontinued operations		(118)			35			74		(2)
Net income	$	2,655	(1)	$	1,303	(1)	$	465	$	917	(1)
Basic earnings per share (2):
Net income from continuing operations	$	.20		$	.09		$	.03	$	.06
Net (loss) income from discontinued operations		(.01)			-			-		-
Net income	$	.19		$	.09		$	.03	$	.06
Diluted earnings per share (2):
Net income from continuing operations	$	.19		$	.09		$	.03	$	.06
Net (loss) income from discontinued operations		(.01)			-			-		-
Net income	$	.18		$	.09		$	.03	$	.06