Note 6 - Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	December 31, 2012									December 31, 2011
	Weighted Average Amortization Period (Years)		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Amortization Period (Years)		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Patents and Trademarks		6.0	$	473,000	$	(360,000	)	$	113,000		7.0	$	466,000	$	(331,000	)	$	135,000

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

2013	$	22,000
2014		19,000
2015		19,000
2016		19,000
2017		11,000
Thereafter		23,000
	$	113,000