Note 3 - Summary of significant accounting policies (Detail) - The exchange rates used to translate amounts in RMB into US$	Dec. 31, 2012	Dec. 31, 2011
Items in the statements of income and comprehensive income, and statements of cash flows	6.3161	6.3647
Twelve Months Ended [Member]
Items in the statements of income and comprehensive income, and statements of cash flows	6.3198	6.4735