Business Segments (Detail Textuals) (USD $)	3 Months Ended
	Mar. 31, 2013 Segment	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of operating segments	2
Total identifiable assets	$ 29,489,000	$ 29,303,000
Advanced Technology Group
Segment Reporting Information [Line Items]
Total identifiable assets	19,459,000	19,211,000
Consumer Products Group
Segment Reporting Information [Line Items]
Total identifiable assets	$ 10,030,000	$ 10,092,000