Financing Transactions (Controlled Equity Offering) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Equity Offering [Member]	Mar. 25, 2013 Equity Offering [Member]
Equity Offering [Line Items]
The maximum value of common stock issuable under the controlled equity offering arrangement				$ 15,000,000
Commission owed to sales agent, expressed as percentage of aggregate gross proceeds from each sale of shares of common stock				3.00%
Proceeds from issuance of common stock, net of offering costs	6,068,891	38,984	5,900,000
Number of shares sold			3,883,173
Amount remaining available under controlled equity offering arrangement			$ 8,600,000