Retail Financing, December 2012 (Details) (USD $)			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Underwriting Agreement [Member]	Dec. 14, 2012 Underwriting Agreement [Member]
Subsidiary, Sale of Stock [Line Items]
Number of shares issued under underwriting agreement (in shares)			1,800,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Public offering price (in dollars per share)			$ 1.50	$ 1.50
Net proceeds from offering			$ 2,196,943