Organization, Business and Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended		12 Months Ended											12 Months Ended					12 Months Ended			1 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2012 Maximum [Member] Computer Software, Intangible Asset [Member]	Jan. 31, 2012 Maximum [Member] Computer Software Intangible Asset Developed For Sale [Member]	Jan. 31, 2012 Fixtures and equipment [Member]	Jan. 31, 2012 Software and Software Development Costs [Member]	Jan. 31, 2012 Building [Member]	Jan. 31, 2012 Leasehold Improvements [Member]	Jan. 31, 2012 Revenues [Member]	Jan. 31, 2011 Revenues [Member]	Jan. 31, 2010 Revenues [Member]	Jan. 31, 2012 Accounts Receivable [Member]	Jan. 31, 2011 Accounts Receivable [Member]	Jan. 31, 2011 Ulticom Inc [Member]	Jan. 31, 2010 Ulticom Inc [Member]	Jan. 31, 2012 Verint [Member]	Jan. 31, 2011 Verint [Member]	Jan. 31, 2012 Starhome B.V. [Member]	Jan. 31, 2012 Common Stock [Member]	Jan. 31, 2011 Common Stock [Member]	Jan. 31, 2010 Common Stock [Member]	Feb. 29, 2012 Repayment of Debt [Member]
Minimum number of wireless and wireline network communication service provider customers	450
Minimum number of countries in which entity operates	125
Total numbers of largest wireless network operators	100
Proposed distribution of Comverse, Inc. shares to CTI shareholders (Percentage)	100.00%
Ownership percentage of both CTI and Comverse, Inc. by current CTI shareholders	100.00%
Equity method investment, ownership percentage																41.80%		66.50%
Voting power																52.70%
Subsidiaries percentage of equity interest in consolidated variable interest entity																50.00%
Noncontrolling interest percentages	33.50%															58.20%	56.10%
Aggregate consideration from sale of Ulticom, Inc.														$ 17,200,000
Gain on Ulticom Sale, net of tax														2,927,000	(35,606,000)
Repayments of notes payable																						800,000
Minimum useful life of property, plant and equipment					1	1	25	1
Maximum useful life of property, plant and equipment					15	5	30	20
Customer concentration risk percentage									10.00%	10.00%	10.00%	10.00%	10.00%
Revenue recognized under new guidance	63,400,000
Additional revenue recognized under new guidance	40,900,000
Deferred revenue recognized under new guidance	$ 19,300,000	$ 8,200,000
Maximum useful life of finite-lived intangible assets			4	7
Tax rate for various jurisdictions	0.00%
Sufficient cash available	Next 12 Months
Repurchase of common stock																			667,971	248,982	47,901