Revolving Lines of Credit and Loan Facilities (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2013
Total bank loans amount with the revolving short term loan	$ 7,249,071
Line of Credit Facility, Interest Rate Description	bearing an interest rate of 0.5% below Hong Kong prime rate per annum.
Long-Term Debt [Member]
Debt Instrument, Face Amount	16,387,119
Long-term Debt, Gross	13,972,308
Revolving Short Term Loan [Member] | Long-Term Debt [Member]
Debt Instrument, Face Amount	1,538,462	[1]
Long-term Debt, Gross	$ 1,528,620

[1] The bank loans are combined from the summary of Note 9, total bank loans amount to $7,249,071 with a revolving short term loan of $1,528,620. The revolving short term loan is placed under Other Current Liabilities on the balance sheet. It has a facility limit of $1,538,462, bearing an interest rate of 0.5% below Hong Kong prime rate per annum.