Consolidated Balance Sheets (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 0	$ 0
Reverse stock split ratio	0.25
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Authorized shares	150,000,000	150,000,000
Common stock, shares issued	29,219,695	26,251,968
Common stock, shares outstanding	29,219,695	26,251,968
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Authorized shares	13,000,000	13,000,000
Common stock, shares issued	8,889	8,889
Common stock, shares outstanding	8,889	8,889