Common and Preferred Stock Issued / Common Stock Issuable (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Common Stock Issued and Issuable and Preferred Stock Issued [Abstract]
Discount rate to purchase shares of common stock	5.00%
Number of shares issued	18,170	35,648
Amount of shares issued	$ 189,000	$ 278,000
Number of shares issuable under the deferred compensation plan	133,469	90,126