Stock Warrants (Stock Warrant Actitvities) (Details)	6 Months Ended
	Jun. 30, 2013
Class of Warrant or Right [Line Items]
Shares - beginning of period	490,369
Exercised
Cancelled
Shares - end of period	490,369
Weighted average exercise price - beginning of period	92.24
Exercised
Cancelled
Weighted average exercise price - end of period	92.24
Weighted average remaining contractual term - beginning of period	3 months 7 days
Weighted average remaining contractual term - end of period	0 years