Fair Value (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014		Jan. 31, 2014
Fair Value (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investment in cooperative	$ 311	[1]	$ 289	[1]
Total assets			411
Interest rate swap derivative liability	371		1,141
Cash equivalents			2
Money market mutual fund (1)			120	[1]
Fair Value, Inputs, Level 1 [Member]
Fair Value (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investment in cooperative		[1]		[1]
Total assets			122
Cash equivalents			2
Money market mutual fund (1)			120	[1]
Fair Value, Inputs, Level 2 [Member]
Fair Value (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investment in cooperative		[1]		[1]
Interest rate swap derivative liability	371		1,141
Money market mutual fund (1)				[1]
Fair Value, Inputs, Level 3 [Member]
Fair Value (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investment in cooperative	311	[1]	289	[1]
Total assets			289
Money market mutual fund (1)				[1]

[1] The money market mutual fund and the investment in cooperative are included in "Other assets" on the accompanying Consolidated Condensed Balance Sheets.