Subsequent Events (Details) (Subsequent event, USD $)	0 Months Ended
	Jul. 23, 2013
Subsequent Events
Minimum bid price per share required to regain compliance with listing qualifications (in dollars per share)	$ 1.00
Minimum consecutive business days for which a minimum specified bid price per share is required to regain listing compliance	10 days
Class A Common Stock | Minimum
Subsequent Events
Share price (in dollars per share)	$ 1.00