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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (USD $) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 9 Months Ended |  |
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May 31, 2009 | Jan. 29, 2012 | Jul. 31, 2011 | Jul. 29, 2012 | Jul. 31, 2011 | Nov. 01, 2009 | Jul. 29, 2012 Warrants on common stock [Member] Investment and other income (expense), net [Member] | Jul. 31, 2011 Warrants on common stock [Member] Investment and other income (expense), net [Member] | Jul. 29, 2012 Warrants on common stock [Member] Investment and other income (expense), net [Member] | Jul. 31, 2011 Warrants on common stock [Member] Investment and other income (expense), net [Member] | Jul. 29, 2012 Other liabilities [Member] Warrants on common stock [Member] | Oct. 30, 2011 Other liabilities [Member] Warrants on common stock [Member]
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued (in shares) | 2,100,000 |  |  |  |  |  |  |  |  |  |  |
Number of shares for each warrant exercisable (in shares) | 1 |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) | $ 0.01 |  |  |  |  |  |  |  |  |  |  |
Percentage of warrants exercisable upon issuance (in hundredths) | 40.00% |  |  |  |  |  |  |  |  |  |  |
Incremental percentage of warrants exercisable thereafter (in hundredths) | 20.00% |  |  |  |  |  |  |  |  |  |  |
Warrants cancelled (in shares) |  |  |  |  |  | 1,200,000 |  |  |  |  |  |
Warrants exercised (in shares) |  | 200,000 |  |  |  |  |  |  |  |  |  |
Amount of Gain (Loss) Recognized related to Derivative Instruments |  | $ 100,000 | $ 200,000 |  | $ (600,000) |  | $ 0 | $ 221,000 | $ 94,000 | $ (599,000) |  |
Amount of cash flow hedge to be recognized in income |  |  |  | 100,000 |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Derivatives Not Designated as Hedging Instruments Under ASC 815 |  |  |  |  |  |  |  |  |  |  | 0 | 1,147,000
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount of Gain (Loss) Recognized related to Derivative Instruments |  | $ 100,000 | $ 200,000 |  | $ (600,000) |  | $ 0 | $ 221,000 | $ 94,000 | $ (599,000) |  |

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