SeaChange International, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Investments in Affiliates (Details Textual)

Investments in Affiliates (Details Textual) (USD $)	12 Months Ended
Investments in Affiliates (Details Textual) (USD $)	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Cost-method Investments, Aggregate Carrying Amount	$ 2,951,000	$ 3,013,000
Cost Method Investment Ownership Percentage	20.00%
Common Stock To Be Issued Upon Conversion Of Preferred Shares (in shares)	1,333,334
Gain on sale of investment in affiliates	885,000	0	27,071,000
Minerva Networks Inc [Member]
Cost-method Investments, Aggregate Carrying Amount	1,000,000	1,000,000
Cost Method Investment Ownership Percentage	2.90%
Common Stock To Be Issued Upon Conversion Of Preferred Shares (in shares)	1,300,000
Minerva Networks Inc [Member] \| Preferred Stock [Member]
Cost-method Investments, Aggregate Carrying Amount	1,333,334
Visible World [Member]
Cost-method Investments, Aggregate Carrying Amount	551,000	551,000
Cost Method Investment Ownership Percentage	5.00%
Cost-method Investments, Realized Gains		11,000	500,000
Casa Systems Inc [Member]
Proceeds from Sale of Equity Method Investments			34,100,000
Gain on sale of investment in affiliates			25,200,000
Insite One [Member]
Proceeds from Sale of Equity Method Investments			4,600,000
Gain on sale of investment in affiliates	$ 900,000

- Definition

This element represents the aggregate carrying amount of all cost-method investments held by the Company. Generally, such investments do not have readily determinable fair values and are not required to be accounted for by the equity method. The carrying amount of such securities equates to cost, adjusted for other-than-temporary impairment. The cost method and lower-of-cost or market, an adaptation of the cost method, is generally followed for most investments in noncontrolled corporations, in some corporate joint ventures, and to a lesser extent in unconsolidated subsidiaries, particularly foreign.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 6

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 5

-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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

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-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 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 03-1

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-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 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

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-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 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

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-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.

+ Details

- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References + Details