Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2012
Property and plant [Member]
Summary of estimated useful life of property and equipment
Estimated useful lives of property and equipment	15-20 Years
Leasehold improvements [Member]
Summary of estimated useful life of property and equipment
Estimated useful lives of property and equipment	2-10 Years
Machinery and equipment [Member]
Summary of estimated useful life of property and equipment
Estimated useful lives of property and equipment	10 Years
Office equipment and furniture [Member]
Summary of estimated useful life of property and equipment
Estimated useful lives of property and equipment	3-5 Years
Motor vehicles [Member]
Summary of estimated useful life of property and equipment
Estimated useful lives of property and equipment	5 Years