Note 7 - Land Use Right and Patents (Detail) (USD $)				1 Months Ended	3 Months Ended	12 Months Ended		3 Months Ended
	May 31, 2013 acre	Mar. 31, 2013 Land Use Right [Member]	Mar. 31, 2013 Land Transfer Taxes and Fees [Member] Land Use Right [Member]	Oct. 31, 2012 Land Use Right [Member]	Mar. 31, 2013 Land Use Right [Member] acre	Dec. 31, 2013 Land Use Right [Member]	Dec. 31, 2012 Land Use Right [Member]	Mar. 31, 2013 Patents [Member]	Mar. 31, 2012 Patents [Member]	Dec. 31, 2012 Patents [Member]
Area of Land (in Acres)	40.43				66
Finite-Lived Intangible Assets, Gross		$ 12,000,000	$ 1,670,000		$ 13,751,000		$ 13,670,000	$ 1,366,000		$ 1,366,000
Finite-Lived Intangible Asset, Useful Life				50 years	50 years
Finite-Lived Intangible Assets, Amortization Expense, Annual Amortization					273,000
Amortization of Intangible Assets						70,000		19,000	19,000
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								$ 27,000