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Goodwill and Intangible Assets (Details Textual) (USD $)
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12 Months Ended | 3 Months Ended | |||
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Jan. 31, 2013
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Jan. 31, 2012
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Jan. 31, 2011
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Jan. 31, 2013
Broadcast Servers and Storage Business Unit [Member]
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Apr. 30, 2012
Media Services [Member]
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| Goodwill, Impairment Loss | $ 17,000,000 | ||||
| Goodwill | 45,103,000 | 44,414,000 | 64,679,000 | 600,000 | |
| Amortization of intangibles | 3,966,000 | 3,784,000 | 3,073,000 | ||
| Amortization Expense Charged To Cost Of Product Revenues | 2,400,000 | 2,500,000 | 2,000,000 | ||
| Amortization Expense Charged To Operating Expense | 4,000,000 | 3,800,000 | 3,100,000 | ||
| Intangible assets, net | $ 17,514,000 | $ 22,432,000 | |||
| X | ||||||||||
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- Definition
Represents the amortization expense charged to cost of product revenues. No definition available.
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- Definition
Represents the amorizaion expense charged to operating expense. No definition available.
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- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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