Note 10 - Investment in and advance to equity investment affiliates (Detail)	1 Months Ended		3 Months Ended						3 Months Ended			3 Months Ended			1 Months Ended
	Dec. 19, 2012 USD ($)	Dec. 19, 2012 CNY	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Dec. 29, 2011 USD ($)	Apr. 18, 2011	Jan. 06, 2011 USD ($)	Jun. 24, 2010	Mar. 31, 2013 Shenzhen Mingshan [Member] USD ($)	Mar. 31, 2012 Shenzhen Mingshan [Member] USD ($)	Jan. 06, 2011 Shenzhen Mingshan [Member]	Mar. 31, 2013 Zhao Shang Ke Hubei [Member] USD ($)	Mar. 31, 2012 Zhao Shang Ke Hubei [Member] USD ($)	Jan. 06, 2011 Revised Share Of Equity [Member]	Dec. 19, 2012 Revised Registered And Paid In Capital [Member] USD ($)	Dec. 19, 2012 Revised Registered And Paid In Capital [Member] CNY	Dec. 19, 2012 Revised Share Of Equity [Member]	Dec. 29, 2011 Revised Share Of Equity [Member]
Equity Method Investment, Ownership Percentage	20.40%	20.40%			25.50%	51.00%	20.40%	51.00%			51.00%			20.40%			23.18%	25.50%
Investment Contributed By New Investors (in Dollars)					$ 1,591,951		$ 2,387,927
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners					50.00%		60.00%
Registered And Paid In Capital Of Equity Invement Affiliate (in Yuan Renminbi)	3,979,878	25,000,000													3,502,292	22,000,000
Registered And Paid In Capital Of Equity Invement Affiliate (in Dollars)	3,979,878	25,000,000													3,502,292	22,000,000
Income (Loss) from Equity Method Investments (in Dollars)			$ (71,000)	$ (193,000)					$ (26,000)	$ (83,000)		$ (45,000)	$ 110,000