Note 7 - Land Use Right and Patents (Details) (USD $)	1 Months Ended				1 Months Ended		6 Months Ended				6 Months Ended
	May 31, 2013	Apr. 30, 2012	May 31, 2013 Land Transfer Taxes and Fees [Member] Land Use Right [Member]	Apr. 30, 2012 Land Transfer Taxes and Fees [Member] Land Use Right [Member]	May 31, 2013 Land Use Right [Member] acre	Oct. 31, 2012 Land Use Right [Member]	Jun. 30, 2013 Land Use Right [Member]	May 27, 2013 Land Use Right [Member]	Dec. 31, 2012 Land Use Right [Member]	Apr. 30, 2012 Land Use Right [Member] acre	Jun. 30, 2013 Patents [Member]	Jun. 30, 2012 Patents [Member]	Dec. 31, 2012 Patents [Member]
Note 7 - Land Use Right and Patents (Details) [Line Items]
Land Use Right Term	50 years	50 years
Area of Land (in Acres)					40					66
Finite-Lived Intangible Assets, Gross			$ 1,200,000	$ 1,670,000	$ 8,600,000		$ 22,549,000		$ 13,670,000	$ 13,670,000	$ 1,366,000		$ 1,366,000
Incentive from Lessor								8,600,000
Finite-Lived Intangible Asset, Useful Life					50 years	50 years	50 years
Finite-Lived Intangible Assets, Amortization Expense, Annual Amortization							445,000
Amortization of Intangible Assets							170,000				38,000	38,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months											76,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two											76,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three											76,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four											$ 8,000