Stockholders' Equity - Common and Preferred Shares (Details Textual) (USD $)	3 Months Ended					3 Months Ended			1 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Apr. 30, 2013	Dec. 31, 2012	Mar. 31, 2013 2005 Plan [Member]	Mar. 31, 2013 Lincoln Park Capital Fund, LLC [Member]	Mar. 31, 2012 Lincoln Park Capital Fund, LLC [Member]	Nov. 30, 2011 Lincoln Park Capital Fund, LLC [Member]	Apr. 30, 2013 MLV & Co. LLC [Member]	Mar. 31, 2013 MLV & Co. LLC [Member]	Mar. 31, 2012 MLV & Co. LLC [Member]	Mar. 31, 2013 Committed Equity Financing Facility [Member]	Mar. 31, 2013 Direct Registration Series I Warrants [Member]
Stockholders' Equity - Common and Preferred Shares (Textual) [Abstract]
Value of purchase agreement for the sale with Lincoln Park Capital Fund, LLC								$ 20,000,000
Purchase agreement period						36 months
Common stock, new shares issued						0	81,990		99,000	323,000	0
Proceeds from issuance of common stock, net of issuance costs	1,510,000	471,000					959,000		406,000	1,510,000
Shares issued as a commitment fee							2,498
Minimum Purchase Price Per Share						$ 6.00
Additional value of purchase agreement for the sale with Lincoln Park Capital Fund, LLC						17,400,000
Common stock, additional shares issued in connection with Lincoln Park Capital Fund, LLC						66,862
Maximum number of shares acquired for the award of options, restricted stock and stock appreciation					333,333
Maximum number of shares granted to any one participant in any fiscal year					16,666
Warrant closing date												Aug. 19, 2013	Jul. 20, 2014
Stockholders' Equity - Common and Preferred Shares (Additional Textual) [Abstract]
Total dollar amount of common stock company could sell under the ATM			264,000
The value of warrants recorded on the Company's balance sheet	0			0
Unrecognized compensation cost related to stock option awards	$ 190,174
Weighted average period for recognizing unrecognized compensation cost as expense	2 years 5 months 5 days
Effectiveness of registration statement	90 days