2.2.0.25falsefalse0214 - Disclosure - Subsequent Eventtruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $FROM_Jan01_2011_TO_Mar31_2011http://www.sec.gov/CIK0001265888duration2011-01-01T00:00:002011-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0EPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0nsr_SubsequentEventsAbstractnsrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSubsequent Events [Abstract]3false0us-gaap_ScheduleOfSubsequentEventsTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse0014. SUBSEQUENT EVENTOn April 21, 2011, the Company entered into a definitive agreement to acquire the assets and certain liabilities of the Numbering Solutions business from Evolving Systems, Inc. for cash consideration of approximately $39.0 million, subject to certain purchase price adjustments. Evolving Systems' Numbering Solutions business will expand the Company's Carrier Services and further the Company's long-term initiative to simplify operators' Operations Support Systems architectures by mitigating cost and complexity, while making the evolution to next-generation networks more efficient, manageable, and flexible to meet the increasingly complex needs of end-users. The acquisition, which is subject to customary closing conditions including the affirmative vote of a majority of Evolving Systems, Inc. stockholders, is expected to close within 120 days.14. SUBSEQUENT EVENTOn April 21, 2011, the Company entered into a definitive agreement to acquire the assets and certain liabilities of the NumberingfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescribes disclosed significant events or transactions that occurred after the balance sheet date, but before the issuance of the financial statements. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, losses resulting from fire or flood, losses on receivables, significant realized and unrealized gains and losses that result from changes in quoted market prices of securities, declines in market prices of inventory, changes in authorized or issued debt (SEC), significant foreign exchange rate changes, substantial loans to insiders or affiliates, significant long-term investments, and substantial dividends not in the ordinary course of business.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 11 falsefalseSUBSEQUENT EVENTS12Subsequent EventUnKnownUnKnownUnKnownUnKnownfalsetrue