Note 7 - Other receivables, net (Details) - Other receivables, net (USD $)	Jun. 30, 2013	Dec. 31, 2012
Note 7 - Other receivables, net (Details) - Other receivables, net [Line Items]
Allowance for doubtful debts	$ (956,000)	$ (158,000)
Other receivables, net	3,080,000	3,103,000
Short-term loans to unrelated entities	485,000	475,000
Term deposit interest receivable	120,000	59,000
Short-term Loan [Member]
Note 7 - Other receivables, net (Details) - Other receivables, net [Line Items]
Other receivables, gross	2,262,000	2,375,000
Staff Advances [Member]
Note 7 - Other receivables, net (Details) - Other receivables, net [Line Items]
Other receivables, gross	213,000	194,000
Overdue Contract Execution Deposits [Member]
Note 7 - Other receivables, net (Details) - Other receivables, net [Line Items]
Other receivables, gross	$ 956,000	$ 158,000