Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Operating activities
Net income (loss)	$ (3,830)	$ (13,803)	$ (17,594)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	4,368	5,021	5,352
Provision for doubtful accounts	(75)	196	79
(Gain) loss on sale of property, plant and equipment	(37)	(1)	(7)
Deferred income taxes	66	228	9,859
Stock-based compensation	698	735	799
Changes in operating assets and liabilities:
Trade accounts receivable	4,057	(2,476)	3,586
Other receivables	293	(233)	(27)
Inventories	2,475	7,579	8,218
Income taxes	(930)	(369)	(506)
Prepaid expenses and other current assets	567	(31)	(584)
Accounts payable and accrued liabilities	(489)	2,244	(3,723)
Net cash provided by (used in) operating activities	7,163	(910)	5,452
Investing activities
Capital expenditures	(2,050)	(2,159)	(3,002)
Proceeds from sale of property, plant and equipment	53	2	39
Net investment in life insurance	244	170	149
Net cash provided by (used in) investing activities	(1,753)	(1,987)	(2,814)
Financing activities
Proceeds from long-term debt	28,422	29,263	35,648
Repayment of long-term debt	(35,876)	(24,287)	(36,041)
Purchase of treasury stock	0	0	(344)
Cash dividend paid	0	(710)	(1,418)
Net cash provided by (used in) financing activities	(7,454)	4,266	(2,155)
Net increase (decrease) in cash	(2,044)	1,369	483
Cash at beginning of year	2,897	1,528	1,045
Cash at end of year	853	2,897	1,528
Interest	1,556	1,122	1,077
Income tax, net	12	32	68
Decrease in accrued asset retirement obligations	$ 0	$ (100)	$ 0