Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified |
Apr. 30, 2013
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Jan. 31, 2013
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Financial assets: | ||||||||
Cash | $ 105,525 | $ 104,109 | ||||||
Money market accounts | 3,664 | [1] | 2,612 | [1] | ||||
Available for sale marketable securities: | ||||||||
U.S. government agency issues - Current | 5,037 | 6,104 | ||||||
Non-current marketable securities: | ||||||||
U.S. government agency issues - Non current | 7,154 | 7,169 | ||||||
Total | 121,380 | 119,994 | ||||||
Other liabilities: | ||||||||
Acquisition-related consideration | 2,388 | [2] | 5,656 | [2] | ||||
Fair Value, Inputs, Level 1 [Member]
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||||||||
Financial assets: | ||||||||
Cash | 105,525 | 104,109 | ||||||
Money market accounts | 3,664 | [1] | 2,612 | [1] | ||||
Available for sale marketable securities: | ||||||||
U.S. government agency issues - Current | 5,037 | 6,104 | ||||||
Non-current marketable securities: | ||||||||
U.S. government agency issues - Non current | 7,154 | 7,169 | ||||||
Total | 121,380 | 119,994 | ||||||
Other liabilities: | ||||||||
Acquisition-related consideration | 0 | [2] | 0 | [2] | ||||
Fair Value, Inputs, Level 2 [Member]
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||||||||
Financial assets: | ||||||||
Cash | 0 | 0 | ||||||
Money market accounts | 0 | [1] | 0 | [1] | ||||
Available for sale marketable securities: | ||||||||
U.S. government agency issues - Current | 0 | 0 | ||||||
Non-current marketable securities: | ||||||||
U.S. government agency issues - Non current | 0 | 0 | ||||||
Total | 0 | 0 | ||||||
Other liabilities: | ||||||||
Acquisition-related consideration | 0 | [2] | 0 | [2] | ||||
Fair Value, Inputs, Level 3 [Member]
|
||||||||
Financial assets: | ||||||||
Cash | 0 | 0 | ||||||
Money market accounts | 0 | [1] | 0 | [1] | ||||
Available for sale marketable securities: | ||||||||
U.S. government agency issues - Current | 0 | 0 | ||||||
Non-current marketable securities: | ||||||||
U.S. government agency issues - Non current | 0 | 0 | ||||||
Total | 0 | 0 | ||||||
Other liabilities: | ||||||||
Acquisition-related consideration | $ 2,388 | [2] | $ 5,656 | [2] | ||||
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