Note 3 - Summary of significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2012

Balance Sheet Items Except Equity Accounts [Member]

Foreign Currency Exchange Rates [Table Text Block]

	As of December 31,
	2012		2011
Balance sheet items, except for equity accounts		6.3161		6.3647

Statements of Income, Comprehensive Income and Cash Flows [Member]

Foreign Currency Exchange Rates [Table Text Block]

	Year ended December 31,
	2012		2011
Items in the statements of income and comprehensive income, and statements of cash flows		6.3198		6.4735