Commitments and Contingencies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Rent expense	$ 2,411,767	$ 2,010,547	$ 2,155,950
Royalty Agreement
Loss Contingencies [Line Items]
Minimum payments under commitment		75,600
Amount of annual increase in payments	5,000
Royalties expensed	760,583	177,379	58,100
7.5% Series A-1 Convertible Preferred Stock
Loss Contingencies [Line Items]
Stock issued for related party leases	$ 862,500
Minimum | Royalty Agreement
Loss Contingencies [Line Items]
Percentage of royalty obligations	0.50%
Maximum | Royalty Agreement
Loss Contingencies [Line Items]
Percentage of royalty obligations	6.00%