Related Party Transactions (Details) (USD $)	3 Months Ended	6 Months Ended
Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Jan. 31, 2013
Related Party Transactions [Abstract]
Revenue from sales to the related party	$ 700,000	$ 700,000	$ 1,200,000	$ 900,000
Expenses related to purchases from the related party	300,000	200,000	600,000	400,000
Accounts receivable from the related party	0		0		0
Accounts payable to related parties	$ 0		$ 0		$ 0

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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