Commitments (Details) (USD $)	12 Months Ended		1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012 Illinois One [Member]	May 31, 2012 Illinois One [Member]	Sep. 30, 2012 Illinois One [Member] Minimum [Member]	Sep. 30, 2012 Illinois One [Member] Maximum [Member]	Sep. 30, 2012 Illinois Two [Member]	Sep. 30, 2012 Illinois Two [Member] Minimum [Member]	Sep. 30, 2012 Illinois Two [Member] Maximum [Member]	Sep. 30, 2012 Illinois Three [Member]	Sep. 30, 2012 Illinois Three [Member] Minimum [Member]	Sep. 30, 2012 Illinois Three [Member] Maximum [Member]	Sep. 30, 2012 Illinois Four [Member]	Sep. 30, 2012 Illinois Four [Member] Minimum [Member]	Sep. 30, 2012 Illinois Four [Member] Maximum [Member]	Sep. 30, 2012 Illinois Five [Member]	Sep. 30, 2012 Illinois Five [Member] Minimum [Member]	Sep. 30, 2012 Illinois Five [Member] Maximum [Member]
Lease Period					Mar. 01, 2013	Oct. 31, 2013		Nov. 01, 2013	Oct. 31, 2014		Nov. 01, 2014	Oct. 31, 2015		Nov. 01, 2015	Oct. 31, 2016		Nov. 01, 2016	Feb. 28, 2017
Operating Leases, Rent Expense	$ 935,000	$ 683,000	$ 25,000	$ 10,000			$ 28,000			$ 30,000			$ 33,000			$ 36,000