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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Jan. 31, 2016 | Jan. 31, 2014
Partnership Organization And Basis Of Presentation [Line Items] |  |
Services pursuant to contracts term | 12 months |
Support services term | 12 months |
Additional charges | $ 0 |
Salvage value assigned to property and equipment | $ 0 |
Customers warranty against defects | 3 months |
Anti-dilutive weighted shares of potential common stock |  | 501,000
Customer Relationships [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Intangible Assets Amortization Period | 8 years |
Building [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Estimated useful lives | 30 years |
Property Improvements [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Estimated useful lives | 10 years |
Maximum [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Lease period | 1 year |
Contracts receivable term | 2 years |
Liquid investments maturity period | 3 months |
Short-term investments maturity period | 12 months |
Estimated useful lives | 7 years |
Maximum [Member] | Proprietary Rights Developed Technology and Amortizable Trade Names [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Intangible Assets Amortization Period | 15 years |
Maximum [Member] | Patents [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Intangible Assets Amortization Period | 9 years |
Maximum [Member] | Recording Channels [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Estimated useful lives | 7 years |
Maximum [Member] | Other Peripheral Equipment [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Estimated useful lives | 10 years |
Minimum [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Short-term investments maturity period | 3 months |
Estimated useful lives | 3 years |
Minimum [Member] | Proprietary Rights Developed Technology and Amortizable Trade Names [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Intangible Assets Amortization Period | 10 years |
Minimum [Member] | Patents [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Intangible Assets Amortization Period | 8 years |
Minimum [Member] | Recording Channels [Member] |  |
Partnership Organization And Basis Of Presentation [Line Items] |  |
Estimated useful lives | 5 years |
Minimum [Member] | Other Peripheral Equipment [Member] |  |
Partnership Organization And Basis Of Presentation [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 Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 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 -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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