Note 15 - Patents and Other Intangibles (Tables)

3 Months Ended

Mar. 31, 2013

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

	March 31, 2013						December 31, 2012
	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
Patents	$	1,335,130	$	383,236	$	951,894	$	1,625,292	$	458,831	$	1,166,461
Deferred Patents		670,076		--		670,076		754,113		--		754,113
	$	2,005,206	$	383,236	$	1,621,970	$	2,379,405	$	458,831	$	1,920,574

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

2013	$	105,000
2014		123,000
2015		97,000
2016		80,000
2017		49,000
	$	454,000