Note 6 - Other receivables, net (Detail) - Other receivables, net (USD $)	Jun. 30, 2012	Dec. 31, 2011
Allowance for doubtful debts	$ (740,000)	$ (524,000)
Other receivables, net	5,672,000	3,631,000
Short-term Loan [Member]
Other receivables, gross	3,006,000	2,985,000
Project Development Deposit [Member]
Other receivables, gross	2,453,000
Staff Advances [Member]
Other receivables, gross	213,000	279,000
Overdue Contract Execution Deposits [Member]
Other receivables, gross	$ 740,000	$ 891,000