Composition of Certain Financial Statement Captions (Details 2) (USD $)
In Thousands, unless otherwise specified |
Oct. 31, 2012
item
|
Jan. 31, 2012
|
---|---|---|
Available-for-sale securities | ||
Adjusted Cost | $ 66,252 | $ 83,982 |
Unrealized Gains | 1 | |
Unrealized Losses | (4) | (6) |
Fair Value | 66,248 | 83,977 |
Number of owned securities that were in an unrealized loss position | 20 | |
Money market funds
|
||
Available-for-sale securities | ||
Adjusted Cost | 32,820 | 31,614 |
Fair Value | 32,820 | 31,614 |
Commercial paper
|
||
Available-for-sale securities | ||
Adjusted Cost | 22,244 | 30,481 |
Unrealized Losses | (1) | |
Fair Value | 22,244 | 30,480 |
Corporate debt securities
|
||
Available-for-sale securities | ||
Adjusted Cost | 11,188 | 20,987 |
Unrealized Gains | 1 | |
Unrealized Losses | (4) | (5) |
Fair Value | 11,184 | 20,983 |
U.S. agency notes
|
||
Available-for-sale securities | ||
Adjusted Cost | 900 | |
Fair Value | $ 900 |
X | ||||||||||
- Definition
Represents the cash equivalents and cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. No definition available.
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X | ||||||||||
- Definition
Represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents cash equivalents and short-term investments. No definition available.
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X | ||||||||||
- Definition
This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities. No definition available.
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X | ||||||||||
- Definition
Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the available-for-sale investments determined to be temporarily impaired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Details
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