Note 7 - Other receivables, net (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2013 CNY	Jun. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)
Receivables [Abstract]
Loans and Leases Receivable, Net Amount (in Yuan Renminbi)	$ 4,039,947	$ 4,039,947	25,000,000
Loans and Leases Receivable, Net Amount	4,039,947	4,039,947	25,000,000
Proceeds from Collection of Loans Receivable (in Yuan Renminbi)		1,777,577	11,000,000
Proceeds from Collection of Loans Receivable		1,777,577	11,000,000
Allowance for Doubtful Other Receivables, Current	956,000	956,000			158,000
Provision for Doubtful Accounts	$ 527,000	$ 787,000		$ 561,000