Note 10 - Investment in and advance to equity investment affiliates (Details) - The movement of the investment in and advance to equity investment affiliates (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2013	Jun. 30, 2012
Schedule of Equity Method Investments [Line Items]
Balance as of December 31, 2012 (audited)			$ 959,000	$ 959,000
Share of losses in equity investment affiliates	(54,000)	(104,000)	(125,000)	(125,000)	(297,000)
Exchange translation adjustment			17,000
Balance as of June 30, 2013 (unaudited)	851,000		851,000	851,000
Shenzhen Mingshan [Member]
Schedule of Equity Method Investments [Line Items]
Balance as of December 31, 2012 (audited)			492,000	492,000
Share of losses in equity investment affiliates	(9,000)	(10,000)	(35,000)	(35,000)	(93,000)
Exchange translation adjustment			8,000
Balance as of June 30, 2013 (unaudited)			465,000
Zhao Shang Ke Hubei [Member]
Schedule of Equity Method Investments [Line Items]
Balance as of December 31, 2012 (audited)			467,000	467,000
Share of losses in equity investment affiliates	(45,000)	(94,000)	(90,000)	(90,000)	(204,000)
Exchange translation adjustment			9,000
Balance as of June 30, 2013 (unaudited)			$ 386,000