Stockholders' Equity (Schedule of Warrants Outstanding) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Class of Warrant or Right [Line Items]
Number of Warrants	1,755,330
Warrants exercised	326,933
Warrants exercised, shares issued	326,933
Warrants forfeited	6,821
N [Member]
Class of Warrant or Right [Line Items]
Warrants exercised	100,000
O [Member]
Class of Warrant or Right [Line Items]
Warrants exercised	93,600
Warrants forfeited	4,634
P [Member]
Class of Warrant or Right [Line Items]
Warrants forfeited	2,187
Q [Member]
Class of Warrant or Right [Line Items]
Warrants exercised	133,333
R [Member]
Class of Warrant or Right [Line Items]
Number of Warrants	1,705,330
Exercise Price	9.90
Expiration Date	Jun. 22, 2016
S [Member]
Class of Warrant or Right [Line Items]
Number of Warrants	50,000
Exercise Price	11.81
Expiration Date	Jan. 14, 2019