Note 8 - Other receivables, net (Detail) - Other receivables, net (USD $)	Dec. 31, 2012	Dec. 31, 2011
Allowance for doubtful debts	$ (158,000)	$ (524,000)
Other receivables, net	3,103,000	3,631,000
Short-term loans to unrelated entities	475,000
Term deposit interest receivable	59,000
Short-term Loan [Member]
Other receivables, gross	2,375,000	2,985,000
Staff Advances [Member]
Other receivables, gross	194,000	279,000
Overdue Contract Execution Deposits [Member]
Other receivables, gross	$ 158,000	$ 891,000