CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 31, 2015	Jan. 31, 2014
Operating activities
Net (loss) income	$ (256)us-gaap_NetIncomeLoss	$ 21,027us-gaap_NetIncomeLoss
Adjustments to reconcile net (loss) income to net cash flows provided by operating activities
Depreciation and amortization expense	5,897	5,785
Gain on disposal of discontinued operations	(188)us-gaap_GainLossOnSaleOfBusiness	(11,449)us-gaap_GainLossOnSaleOfBusiness
Deferred tax expense (benefit)	1,439us-gaap_DeferredIncomeTaxExpenseBenefit	(3,190)us-gaap_DeferredIncomeTaxExpenseBenefit
Income in joint venture	(1,960)	(528)
Stock-based compensation expense	124us-gaap_ShareBasedCompensation	196us-gaap_ShareBasedCompensation
Cash surrender value on life insurance policies	(145)	(164)
Provision on uncollectible accounts	(80)	(158)
Gain (loss) on disposal of fixed assets	17	(328)
Changes in operating assets and liabilities
Accounts payable	(4,612)	(4,438)
Accrued compensation and payroll taxes	(3,055)	6,026
Inventories	3,348us-gaap_IncreaseDecreaseInInventories	8,608us-gaap_IncreaseDecreaseInInventories
Customers' deposits	(28)	(198)
Income taxes receivable and payable	(687)	2,564
Prepaid expenses and other current assets	977	(619)
Accounts receivable	3,314	(18,015)
Costs and estimated earnings in excess of billings on uncompleted contracts	(765)	1,110
Notes receivable	849	331
Other assets and liabilities	(49)	(816)
Net cash provided by operating activities	4,106	6,400
Investing activities
Net proceeds from sale of discontinued operations	109	15,172
Capital expenditures	(5,878)	(2,761)
Proceeds from sales of property and equipment	24	16
Net cash (used in) provided by investing activities	(5,745)	12,427
Financing activities
Proceeds from revolving lines	85,270us-gaap_ProceedsFromLinesOfCredit	102,344us-gaap_ProceedsFromLinesOfCredit
Proceeds from debt	661us-gaap_ProceedsFromBankDebt	5,197us-gaap_ProceedsFromBankDebt
Payments of debt on revolving lines	(83,150)us-gaap_RepaymentsOfLinesOfCredit	(109,501)us-gaap_RepaymentsOfLinesOfCredit
Payments of other debt	(3,641)us-gaap_RepaymentsOfLongTermDebt	(7,643)us-gaap_RepaymentsOfLongTermDebt
Stock options exercised and deferred shares issued	389	1,592
Increase (decrease) in drafts payable	629	(3,125)
Payments on capitalized lease obligations	(704)	(603)
Net cash used in financing activities	(546)	(11,739)
Effect of exchange rate changes on cash and cash equivalents	(702)	(727)
Net (decrease) increase in cash and cash equivalents	(2,887)	6,361
Cash and cash equivalents - beginning of period	13,395	7,034
Cash and cash equivalents - end of period	10,508	13,395
Supplemental cash flow information
Interest paid	1,288us-gaap_InterestPaid	1,958us-gaap_InterestPaid
Income taxes paid	2,988us-gaap_IncomeTaxesPaid	409us-gaap_IncomeTaxesPaid
Fixed assets acquired under capital leases	680	107
Funds held in escrow related to the sale of Thermal Care, Inc. assets	$ 0us-gaap_ProceedsFromOtherDeposits	$ 1,125us-gaap_ProceedsFromOtherDeposits

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- Definition

Amount after tax of income (loss) attributable to nonredeemable noncontrolling shareholder, unit holder, partner, or other equity holder of a joint venture.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.19)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- Definition

The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

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- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

+ Details

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Period Type:	duration

- Definition

The cash inflow from bank borrowing during the year.

+ References

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

Cash inflow related to receipts of other deposits not otherwise defined in the taxonomy.

+ References

No definition available.

+ Details

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

+ Details

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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- Definition

The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).

+ References

+ Details

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Namespace Prefix:	us-gaap_
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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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- Details

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