Accrued Expenses and Other Current Liabilities (Details) - Schedule of accrued expenses and other current liabilities (USD $) In Thousands, unless otherwise specified	Oct. 31, 2014	Jan. 31, 2014
Schedule of accrued expenses and other current liabilities [Abstract]
Accrued utility charges	$ 1,517	$ 3,745
Accrued income taxes	11,491
Accrued payroll and related items	3,758	3,122
Accrued real estate taxes	1,051	2,471
Other	1,694	2,809
Total	$ 19,511	$ 12,147