(2) Share-Based Payment Arrangements (Details 1)	Sep. 30, 2012
FalconStor Software, Inc., 2000 Stock Option Plan Member
Shares Available for grant
Shares outstanding	3,142,612
1994 Outside Directors Stock Option Plan Member
Shares Available for grant
Shares outstanding	40,000
2004 Outside Directors Stock Option Plan Member
Shares Available for grant
Shares outstanding	190,000
FalconStor Software, Inc., 2007 Outside Directors Equity Compensation Plan Member
Shares Available for grant
Shares outstanding	170,000
Stand-Alone Stock Option Agreement between the Company and James P. McNiel Member
Shares Available for grant
Shares outstanding	1,220,000