v2.4.0.6

Line of Credit (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2010 | Dec. 31, 2009 | Apr. 30, 2008
Line of Credit (Textual) [Abstract] |  |  |  |
Amount lender could advance |  |  |  | $ 45
Amount taken from prime rate for option one | 0.50% |  |  |
Amount added to LIBOR for option two | 2.00% |  |  |
Interest rate Description, Line of Credit Facility | LIBOR rate plus 2.00% |  |  |
Period of written notice for termination of line of credit agreement | 60 days |  |  |
Agreement termination date | Sep. 22, 2010 |  |  |
Amount drawn against Line of credit |  | $ 0 | $ 25.5 |
Line of credit facility percentage outstanding |  |  | 88.00% |

X
- Definition Amount added to LIBOR for option two. + References No definition available. + Details
Name: | ifon_AmountAddedToLiborForOptionTwo
Namespace Prefix: | ifon_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount taken from prime rate for option one. + References No definition available. + Details
Name: | ifon_AmountTakenFromPrimeRateForOptionOne
Namespace Prefix: | ifon_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line Of Credit Description Of Variable Rate Basis. + References No definition available. + Details
Name: | ifon_LineOfCreditDescriptionOfVariableRateBasis
Namespace Prefix: | ifon_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line of credit facility percentage outstanding. + References No definition available. + Details
Name: | ifon_LineOfCreditFacilityPercentageOutstanding
Namespace Prefix: | ifon_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line of credit termination notice period. + References No definition available. + Details
Name: | ifon_LineOfCreditTerminationNoticePeriod
Namespace Prefix: | ifon_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LineOfCreditFacilityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityAmountOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant