Stockholders' Equity (Details 3)	Dec. 31, 2012	Dec. 31, 2011
Common Stock, Capital Shares Reserved for Future Issuance	11,345,726	10,069,578
Warrant [Member]
Common Stock, Capital Shares Reserved for Future Issuance	2,023,530	2,875,022
Stock Option [Member]
Common Stock, Capital Shares Reserved for Future Issuance	7,076,070	5,812,430
Stock Options Available For Future Grants [Member]
Common Stock, Capital Shares Reserved for Future Issuance	2,246,126	1,382,126