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Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 31, 2012
Jan. 31, 2011
Jan. 31, 2010
Operating activities      
Net loss $ (13,803) $ (17,594) $ (725)
Cash (used in) provided by operating activities      
Depreciation and amortization 5,021 5,352 5,387
Provision for doubtful accounts 196 79 127
(Gain) loss on sale of property, plant and equipment and other, net (1) (7) 2
Deferred income taxes 229 9,859 (916)
Stock-based compensation 735 799 857
Changes in operating assets and liabilities      
Trade accounts receivable (2,476) 3,586 (61)
Other receivables (233) (27) 269
Inventories 7,579 8,218 (2,070)
Income taxes (369) (506) 58
Prepaid expenses and other current assets (32) (584) 146
Accounts payable and accrued liabilities 2,244 (3,723) (5,869)
Net cash (used in) provided by operating activities (910) 5,452 (2,795)
Investing activities      
Capital expenditures (2,159) (3,002) (5,345)
Proceeds from sale of property, plant and equipment 2 39 27
Net investment in life insurance 170 149 36
Net cash used in investing activities (1,987) (2,814) (5,282)
Financing activities      
Proceeds from long-term debt 29,263 35,648 29,043
Repayment of long-term debt (24,287) (36,041) (22,233)
Purchase of treasury stock   (344) (654)
Cash dividend paid (710) (1,418) (1,421)
Net cash provided by (used in) financing activities 4,266 (2,155) 4,735
Net increase (decrease) in cash 1,369 483 (3,342)
Cash at beginning of year 1,528 1,045 4,387
Cash at end of year 2,897 1,528 1,045
Cash paid during the year for:      
Interest 1,122 1,077 1,127
Income tax, net 32 68 176
Decrease in accrued asset retirement obligations $ (100)   $ (200)