Related Party Transactions (Details) (USD $)	3 Months Ended					12 Months Ended
	Mar. 31, 2013 Affiliated Entity	Dec. 31, 2012 Affiliated Entity	Feb. 29, 2012 Affiliated Entity	Jun. 30, 2011 Affiliated Entity	Dec. 01, 2009 Affiliated Entity	Dec. 31, 2012 Member of Board of Directors	Dec. 31, 2011 Member of Board of Directors	Dec. 31, 2010 Member of Board of Directors
Related Party Transaction [Line Items]
Lease property price per month			$ 12,000	$ 11,000	$ 8,000
Lease agreement, cancellation period		0 years 0 months 60 days
Free rent period	5 months
Monthly rental payments first five years	60,000
Initial rent period	5 years
Monthly rental payments after five years	63,000
Rent period after first five years	2 years
Legal fees						2,000,000	3,100,000	2,700,000
Accounts payable to related party						$ 563,000