Investments in Affiliates (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Total investments in affiliates	$ 1,887	$ 2,951
Minerva [Member]
Total investments in affiliates	0	1,000
Visible World [Member]
Total investments in affiliates	551	551
Other investments [Member]
Total investments in affiliates	$ 1,336	$ 1,400

This element represents the aggregate carrying amount of all cost-method investments held by the Company. Generally, such investments do not have readily determinable fair values and are not required to be accounted for by the equity method. The carrying amount of such securities equates to cost, adjusted for other-than-temporary impairment. The cost method and lower-of-cost or market, an adaptation of the cost method, is generally followed for most investments in noncontrolled corporations, in some corporate joint ventures, and to a lesser extent in unconsolidated subsidiaries, particularly foreign.

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+ Details