Note 3 - Summary of significant accounting policies (Tables)

6 Months Ended

Jun. 30, 2013

Balance Sheet Items Except Equity Accounts [Member]

Note 3 - Summary of significant accounting policies (Tables) [Line Items]

Foreign Currency Exchange Rates [Table Text Block]

	June 30, 2013		December 31, 2012
Balance sheet items, except for equity accounts		6.1882		6.3161

Items In Income Statements And Comprehensive Income And Statements Of Cash Flows Six Months Ended [Member]

Note 3 - Summary of significant accounting policies (Tables) [Line Items]

Foreign Currency Exchange Rates [Table Text Block]

	Six Months Ended June 30
	2013		2012
Items in the statements of income and comprehensive income, and statements of cash flows		6.2479		6.3255

Items In Income Statements And Comprehensive Income And Statements Of Cash Flows Three Months Ended [Member]

Note 3 - Summary of significant accounting policies (Tables) [Line Items]

Foreign Currency Exchange Rates [Table Text Block]

	Three Months Ended June 30,
	2013		2012
Items in the statements of income and comprehensive income, and statements of cash flows		6.2105		6.3309