Investments in Marketable Securities (Details)
In Thousands, unless otherwise specified |
Jan. 31, 2013
USD ($)
|
Sep. 01, 2012
USD ($)
|
Sep. 01, 2012
EUR (€)
|
Jan. 31, 2012
USD ($)
|
Sep. 01, 2009
USD ($)
|
Sep. 01, 2009
EUR (€)
|
Jan. 31, 2013
Fair Value, Inputs, Level 1 [Member]
USD ($)
|
Jan. 31, 2012
Fair Value, Inputs, Level 1 [Member]
USD ($)
|
Jan. 31, 2013
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Jan. 31, 2012
Fair Value, Inputs, Level 2 [Member]
USD ($)
|
Jan. 31, 2013
Fair Value, Inputs, Level 3 [Member]
USD ($)
|
Jan. 31, 2012
Fair Value, Inputs, Level 3 [Member]
USD ($)
|
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Financial assets: | ||||||||||||||||||||||||||||
Cash | $ 104,109 | $ 74,226 | $ 104,109 | $ 74,226 | $ 0 | $ 0 | $ 0 | $ 0 | ||||||||||||||||||||
Money market accounts | 2,612 | [1] | 6,359 | [1] | 2,612 | [1] | 6,359 | [1] | 0 | [1] | 0 | [1] | 0 | [1] | 0 | [1] | ||||||||||||
Available for sale marketable securities: | ||||||||||||||||||||||||||||
U.S. government agency issues - Current | 6,104 | 7,855 | 6,104 | 7,855 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Non-current marketable securities: | ||||||||||||||||||||||||||||
U.S. government agency issues - Non current | 7,169 | 4,140 | 7,169 | 4,140 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Total | 119,994 | 92,580 | 119,994 | 92,580 | 0 | 0 | 0 | 0 | ||||||||||||||||||||
Other liabilities: | ||||||||||||||||||||||||||||
Acquisition-related consideration | $ 5,656 | [2] | $ 2,200 | [2] | € 1,700 | [2] | $ 12,255 | [2] | $ 1,000 | [2] | € 800 | [2] | $ 0 | [2] | $ 0 | [2] | $ 0 | [2] | $ 0 | [2] | $ 5,656 | [2] | $ 12,255 | [2] | ||||
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