Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2012
Computer equipment and purchased software [Member]
Estimated useful lives of property and equipment
Useful life of property and equipment	3 years
Machinery and equipment [Member] | Minimum [Member]
Estimated useful lives of property and equipment
Useful life of property and equipment	3 years
Machinery and equipment [Member] | Maximum [Member]
Estimated useful lives of property and equipment
Useful life of property and equipment	5 years
Furniture and fixtures [Member]
Estimated useful lives of property and equipment
Useful life of property and equipment	5 years