Accounting Policies (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012	Jan. 31, 2013
Accounting Policies (Details) [Line Items]
Interest Paid	$ 900,000	$ 1,044,000	$ 2,822,000	$ 3,779,000
Derivative Settlement on Interest Rate Swap	416,000	446,000	1,278,000	1,375,000
Income Taxes Paid			2,150,000	51,000
Proceeds from Income Tax Refunds			0	1,000,000
Unrecognized Tax Benefit	1,710,000		1,710,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	395,000		395,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	24,000		24,000
Inventory Write-down			35,000		466,000
Property, Plant and Equipment, Depreciation Methods			Depreciation is computed using the straight-line method
Impairment of Real Estate			$ 0	$ 300,000
Estimated Cash Flow Percentage			25.00%
Estimated Future Cash Flows Terms			six
Plant Operation Suspension			6 months
Number of Majority Owned Subsidiaries			2
Maximum Percentage of Equity Ownership Interest Which May be Considered for Equity Method of Accounting			20.00%
Building and Building Improvements [Member] | Minimum [Member]
Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives			15
Building and Building Improvements [Member] | Maximum [Member]
Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives			40
Fixtures And Equipment [Member] | Minimum [Member]
Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives			3
Fixtures And Equipment [Member] | Maximum [Member]
Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives			20
Minimum [Member]
Accounting Policies (Details) [Line Items]
Extended Period of Warranty			12 months
Maximum [Member]
Accounting Policies (Details) [Line Items]
Extended Period of Warranty			60 months