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Schedule II (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Valuation and Qualifying Accounts Disclosure [Line Items]
Allowance for Doubtful Accounts Receivable	$ 352	$ 235	$ 346
Provision for Doubtful Accounts	181	63
Allowance for Doubtful Accounts Receivable, Charge-offs	81	20
Valuation Allowances and Reserves, Charged to Other Accounts	$ 17	$ (154)

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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