Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended	13 Months Ended	16 Months Ended
	Mar. 31, 2013 sqft	Dec. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 sqft
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 8,974	$ 8,956	$ 8,956	$ 8,974
Less: accumulated depreciation and amortization	(3,843)	(3,664)	(3,664)	(3,843)
Property and equipment, net	5,131	5,292	5,292	5,131
Construction in progress	6,806	6,580	6,580	6,806
Capitalized interest charges	45	85
Area of facility (square feet)	43,000			43,000
Construction and development costs			7,051	7,494
Margin account loan	7,051	7,051	7,051	7,051
Interest rate during period (percent)	2.50%
Land, buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,209	4,209	4,209	4,209
Furniture, fixtures, and equipment[Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,680	4,662	4,662	4,680
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 85	$ 85	$ 85	$ 85
Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	5 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	39 years