Common Stock (Details) (USD $)	12 Months Ended				0 Months Ended	12 Months Ended									0 Months Ended								12 Months Ended		12 Months Ended			12 Months Ended							12 Months Ended					0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 22, 2011 Safend	Sep. 22, 2011 Class A Common Stock Safend	Dec. 31, 2012 Class A Common Stock Minimum	Dec. 31, 2011 Class A Common Stock Minimum	Dec. 31, 2010 Class A Common Stock Minimum	Dec. 31, 2012 Class A Common Stock Maximum	Dec. 31, 2011 Class A Common Stock Maximum	Dec. 31, 2010 Class A Common Stock Maximum	Dec. 31, 2012 Class A Common Stock Stock Options	Dec. 31, 2011 Class A Common Stock Stock Options	Dec. 31, 2010 Class A Common Stock Stock Options	Dec. 02, 2012 Class A Common Stock 2004 Employee Stock Purchase Plan	Jun. 02, 2012 Class A Common Stock 2004 Employee Stock Purchase Plan	Dec. 02, 2011 Class A Common Stock 2004 Employee Stock Purchase Plan	Jun. 02, 2011 Class A Common Stock 2004 Employee Stock Purchase Plan	Dec. 02, 2010 Class A Common Stock 2004 Employee Stock Purchase Plan	Jun. 02, 2010 Class A Common Stock 2004 Employee Stock Purchase Plan	Oct. 23, 2012 Class A Common Stock Warrants - October 2012 financing	Aug. 08, 2012 Class A Common Stock Warrants - August 2012 financing - Subscribers	Dec. 31, 2012 Class A Common Stock Warrants - August 2012 financing - Subscribers	Aug. 08, 2012 Class A Common Stock Warrants - August 2012 financing - Placement Agent	Dec. 31, 2012 Class A Common Stock Warrants - 2012 and 2009 financing	Dec. 31, 2012 Class A Common Stock Warrants - 2012 and 2009 financing Minimum	Dec. 31, 2012 Class A Common Stock Warrants - 2012 and 2009 financing Maximum	Dec. 31, 2012 Class A Common Stock SRA Warrants - 2009 financing	Dec. 31, 2011 Class A Common Stock Warrants - 2009 and 2008 financing	Dec. 31, 2010 Class A Common Stock Warrants - 2009 and 2008 financing	Dec. 31, 2011 Class A Common Stock Warrants - 2009 and 2008 financing Minimum	Dec. 31, 2010 Class A Common Stock Warrants - 2009 and 2008 financing Minimum	Dec. 31, 2011 Class A Common Stock Warrants - 2009 and 2008 financing Maximum	Dec. 31, 2010 Class A Common Stock Warrants - 2009 and 2008 financing Maximum	Dec. 31, 2011 Class A Common Stock Warrants - 2009 2008 Security Research Associates	Dec. 31, 2010 Class A Common Stock Warrants - 2009 2008 Security Research Associates	Dec. 31, 2012 Class A Common Stock At the market offerings through MLV	Dec. 31, 2012 Class A Common Stock At the market offerings through MLV Minimum	Dec. 31, 2012 Class A Common Stock At the market offerings through MLV Maximum	Oct. 23, 2012 Class A Common Stock Shelf Registration	Aug. 08, 2012 Class A Common Stock Shelf Registration	Oct. 23, 2012 Class A Common Stock Shelf Registration Warrants - October 2012 financing	Aug. 08, 2012 Class A Common Stock Shelf Registration Warrants - August 2012 financing - Subscribers	Aug. 08, 2012 Class A Common Stock Shelf Registration Warrants - August 2012 financing - Placement Agent
Common Stock
Net proceeds from issuance of common stock	$ 13,659,587																				$ 3,073,000	$ 1,533,000															$ 9,053,593			$ 3,073,000	$ 1,533,000
Offering costs																																					290,000
Shares issued																					3,324,750	2,587,824															7,893,066			3,324,750	2,587,824
Share price (in dollars per share)					$ 2.16										$ 0.536	$ 0.85	$ 1.912	$ 2.329	$ 2.244	$ 1.088																		$ 0.65	$ 2.28	$ 1.0025	$ 0.6425
Gross proceeds from issuance of common stock																																								3,333,062	1,662,677
Placement agent fees																					199,984	99,761																		199,984	99,761
Legal and other fees																					60,000	30,000																		60,000	30,000
Common stock issued or agreed to be issued against warrants (in shares)																					1,662,375	1,293,912		155,269																		1,662,375	1,293,912	155,269
Warrants, exercise price (in dollars per share)																					$ 0.94	$ 0.58		$ 0.58		$ 0.55	$ 0.58				$ 0.28	$ 0.28	$ 1.155	$ 1.155								$ 0.94	$ 0.58	$ 0.58
Gross proceeds received from exercise of warrants	320,500	1,260,288	3,979,291																				29,000		320,500				1,260,288	3,979,291
Issuance of shares upon exercise of warrants																							50,000		580,000			40,442	2,008,236	4,405,641
Proceeds from employee stock option exercises	79,503	806,119	1,284,629									79,503	806,119	1,284,629
Issuance of shares upon exercise of employee stock options	91,199	498,618	888,445									91,199	498,618	888,445
Exercise price of employee stock options exercised (in dollars per share)						$ 0.52	$ 0.50	$ 0.50	$ 1.95	$ 3.54	$ 3.00
Total				12,477,528
Amount of consideration paid in cash				1,100,000
Consideration transferred in shares					5,267,374
Deemed value of consideration transferred in shares				11,377,528	11,377,528
Issuance of shares upon the partial cashless exercise of warrants																																			83,304	432,002
Issuance of shares															358,285	557,922	197,581	187,535	151,729	240,190
Proceeds from employee stock purchase plans	$ 666,095	$ 814,644	$ 601,807												$ 191,862	$ 474,233	$ 377,873	$ 436,771	$ 340,480	$ 261,327