Commitments and Contingencies (Details 2)	3 Months Ended	0 Months Ended
	Apr. 30, 2013 Cheetah Omni LLC [Member] patent	Mar. 16, 2012 Graywire LLC [Member] claim	May 29, 2008 Graywire LLC [Member] defendant
Loss Contingencies [Line Items]
Number of patents in defendant's motion for summary judgement	2
Number of defendants other than reporting entity			4
Number of claims settled		2