Equipment and Improvements (Details Textual)	3 Months Ended
	Mar. 31, 2013
Equipment and Improvements (Textual) [Abstract]
Leasehold improvements amortization Description	Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful life of the asset or the lease term.
Maximum [Member]
Equipment and Improvements (Textual) [Abstract]
Estimated useful lives of the asset	7 years
Minimum [Member]
Equipment and Improvements (Textual) [Abstract]
Estimated useful lives of the asset	3 years