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Note 10 - Investment in and advance to equity investment affiliates (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended
Dec. 19, 2012
USD ($)
Dec. 19, 2012
CNY
Jun. 30, 2013
USD ($)
Jun. 30, 2012
USD ($)
Jun. 29, 2013
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2012
USD ($)
Dec. 29, 2011
USD ($)
Dec. 29, 2011
CNY
Dec. 19, 2011
CNY
Apr. 18, 2011
Jan. 06, 2011
USD ($)
Jan. 06, 2011
CNY
Jun. 24, 2010
Jun. 30, 2013
Shenzhen Mingshan [Member]
USD ($)
Jun. 30, 2012
Shenzhen Mingshan [Member]
USD ($)
Jun. 29, 2013
Shenzhen Mingshan [Member]
USD ($)
Jun. 30, 2013
Shenzhen Mingshan [Member]
USD ($)
Jun. 30, 2012
Shenzhen Mingshan [Member]
USD ($)
Jan. 06, 2011
Shenzhen Mingshan [Member]
Dec. 29, 2011
Zhao Shang Ke Hubei [Member]
Revised Share Of Equity [Member]
Jun. 30, 2013
Zhao Shang Ke Hubei [Member]
USD ($)
Jun. 30, 2012
Zhao Shang Ke Hubei [Member]
USD ($)
Jun. 29, 2013
Zhao Shang Ke Hubei [Member]
USD ($)
Jun. 30, 2013
Zhao Shang Ke Hubei [Member]
USD ($)
Jun. 30, 2012
Zhao Shang Ke Hubei [Member]
USD ($)
Dec. 29, 2011
Zhao Shang Ke Hubei [Member]
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]
Note 10 - Investment in and advance to equity investment affiliates (Details) [Line Items]                                                                
Equity Method Investment, Ownership Percentage 20.40% 20.40%                 51.00% 20.40% 20.40% 51.00%           51.00% 25.50%           51.00% 20.40%     23.18% 25.50%
Investment Contributed By New Investors (in Yuan Renminbi)               $ 1,615,979 10,000,000 10,000,000   $ 2,423,968 15,000,000                                      
Investment Contributed By New Investors               1,615,979 10,000,000 10,000,000   2,423,968 15,000,000                                      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners               50.00% 50.00%     60.00% 60.00%                                      
Registered And Paid In Capital Of Equity Invement Affiliate (in Yuan Renminbi) 4,039,947 25,000,000                                                     3,555,153 22,000,000    
Registered And Paid In Capital Of Equity Invement Affiliate 4,039,947 25,000,000                                                     3,555,153 22,000,000    
Income (Loss) from Equity Method Investments     $ (54,000) $ (104,000) $ (125,000) $ (125,000) $ (297,000)               $ (9,000) $ (10,000) $ (35,000) $ (35,000) $ (93,000)     $ (45,000) $ (94,000) $ (90,000) $ (90,000) $ (204,000)