Contractual Commitments and Contingencies (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 patient	Sep. 30, 2013
Loss Contingencies [Line Items]
Lease expiration period			5 years
Rent expense	$ 282,000	$ 364,000	$ 847,000	$ 762,000
Number of patients			150
Estimated annual lease, royalty, and employment agreement expenses [Abstract]
2015	1,879,579		1,879,579
2016	1,863,354		1,863,354
2017	1,523,923		1,523,923
2018	1,463,054		1,463,054
2019	478,325		478,325
Total Contractual commitments	7,208,235		7,208,235
Sales Revenue, Net | Product Concentration Risk
Loss Contingencies [Line Items]
Percentage of revenue			15.00%
Standby Letters of Credit
Loss Contingencies [Line Items]
Standby letters of credit	$ 500,000		$ 500,000
Minimum
Loss Contingencies [Line Items]
Number of clinical sites			10
Maximum
Loss Contingencies [Line Items]
Number of clinical sites			20