Summary of Significant Accounting Policies (Details 1)	12 Months Ended
	Dec. 31, 2012
Leasehold improvements and fixtures	Lesser of estimated useful or life of lease
Office Equipment and Furniture [Member] | Maximum [Member]
Estimated Useful Life	5 years
Office Equipment and Furniture [Member] | Minimum [Member]
Estimated Useful Life	3 years
Laboratory Equipment [Member] | Maximum [Member]
Estimated Useful Life	10 years
Laboratory Equipment [Member] | Minimum [Member]
Estimated Useful Life	7 years
Manufacturing Equipment [Member]
Estimated Useful Life	10 years