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Long-Term Debt and Notes Payable (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Long-term debt and notes payable
Long-term debt gross	$ 2,346	$ 4,383
Less current portion	(147)	(145)
Long-term debt	2,199	4,238
Revolving Credit Facility [Member]
Long-term debt and notes payable
Long-term debt gross	2,000	4,000
Other equipment notes [Member]
Long-term debt and notes payable
Long-term debt gross	$ 346	$ 383

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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