Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Operating activities
Net (loss) income	$ (3,209,000)	$ 22,760,000	$ 4,549,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,466,000	5,026,000	4,757,000
Increase in provision for doubtful accounts	55,000	160,000	141,000
Increase in inventory reserve	493,000	626,000	350,000
(Gain) loss on sale of property, plant and equipment	(16,000)	(2,000)	9,000
Deferred income taxes	5,821,000	(18,122,000)	77,000
Stock-based compensation	830,000	609,000	493,000
Defined benefit plan, recognized net loss due to settlements	0	0	587,000
Amortization of net actuarial loss for pension plans	955,000	1,328,000	2,013,000
Changes in operating assets and liabilities:
Trade accounts receivable	(1,470,000)	14,000	544,000
Other receivables	181,000	(182,000)	10,000
Inventories	(6,861,000)	(1,712,000)	(8,275,000)
Income taxes	112,000	41,000	(54,000)
Prepaid expenses and other current assets	73,000	(536,000)	(532,000)
Accounts payable and accrued liabilities	(748,000)	(4,148,000)	2,838,000
Net cash provided by operating activities	1,682,000	5,862,000	7,507,000
Investing activities
Capital expenditures	(6,208,000)	(4,408,000)	(4,261,000)
Purchase of manufacturing facility	(7,200,000)	0	0
Proceeds from sale of property, plant and equipment	22,000	2,000	8,000
Net proceeds (investments in) from life insurance	119,000	(65,000)	56,000
Net cash used in investing activities	(13,267,000)	(4,471,000)	(4,197,000)
Financing activities
Proceeds from long-term debt	36,742,000	37,447,000	31,960,000
Repayment of long-term debt	(25,072,000)	(38,601,000)	(34,719,000)
Common stock repurchased	(339,000)	(264,000)	(206,000)
Net cash provided by (used in) financing activities	11,331,000	(1,418,000)	(2,965,000)
Net (decrease) increase in cash	(254,000)	(27,000)	345,000
Cash at beginning of year	788,000	815,000	470,000
Cash at end of year	534,000	788,000	815,000
Interest	1,545,000	1,217,000	1,281,000
Income tax, net of refunds	$ 46,000	$ 49,000	$ 72,000