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Organization and Summary of Significant Accounting Policies (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Jan. 31, 2013 | Jan. 31, 2012 | Jan. 31, 2011
Organization and Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Lease period | one year or less |  |
Services pursuant to contracts term | 12 months |  |
Support services term | 12 months |  |
Additional charges | $ 0 |  |
Contracts receivable term | less than two years |  |
Liquid investments maturity period | three months or less |  |
Salvage value assigned to property and equipment | 0 |  |
Impairment charges related to long-lived assets | 0 | 0 | 0
Customers warranty against defects | 3 months |  |
Warranty expense amounted to approximately | $ 61,000 | $ 3,000 | $ 70,000
Anti-dilutive weighted shares of potential common stock | 296,000 | 339,000 | 726,000
Covenants Not To Compete [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible Assets Amortization Period | 3 years |  |
Building [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated useful lives | 30 years |  |
Property Improvements [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated useful lives | 10 years |  |
Maximum [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Short-term investments maturity period | 12 months |  |
Estimated useful lives | 7 years |  |
Maximum [Member] | Proprietary rights [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible Assets Amortization Period | 15 years |  |
Maximum [Member] | Channel Boxes [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated useful lives | 7 years |  |
Maximum [Member] | Peripheral Equipment [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated useful lives | 10 years |  |
Minimum [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Short-term investments maturity period | 3 months |  |
Estimated useful lives | 3 years |  |
Minimum [Member] | Proprietary rights [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible Assets Amortization Period | 12 years 6 months |  |
Minimum [Member] | Channel Boxes [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated useful lives | 5 years |  |
Minimum [Member] | Peripheral Equipment [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated useful lives | 2 years |  |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 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 -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -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 Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph c -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 Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 13, 14 -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
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