Discontinued Operations (Details) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Income Statement, Balance Sheet Discontinued Operations
Cash and cash equivalents held for sale	$ 1,000	$ 1,000
Accounts receivable, net held for sale	595,000	4,564,000
Inventory held for sale	593,000	4,804,000
Other current assets held for sale	34,000	849,000
Assets held for sale current	1,223,000	10,218,000
Property, plant, and equipment, net held for sale	551,000	819,000
Other noncurrent assets held for sale	363,000	434,000
Assets held for sale, noncurrent	914,000	1,253,000
Total assets held for sale	2,688,000	12,290,000
Accounts payable, payroll and accrued liabilities held for sale	492,000	7,496,000
Other liabilities held for sale	35,000	35,000
Liabilities held for sale current	527,000	7,531,000
Liabilities held for sale long-term	968,000	1,485,000
Total liabilities held for sale	1,495,000	9,016,000
Disposal date	Jun. 26, 2013
Net proceeds from sale of discontinued operations	16,300,000
Funds held in escrow related to the sale of Thermal Care, Inc. assets	1,125,000	0
escrow released date	May 01, 2014
Discontinued operation, net sales	14,063,000	43,210,000
Gain on disposal of discontinued operations	11,082,000	0
Income (loss) from discontinued operation	(28,000)	1,237,000
Income (loss) from discontinued operation, before income tax	11,054,000	1,237,000
Discontinued operation, income tax expense (benefit)	2,820,000	(1,035,000)
Income from discontinued operations, net of tax	$ 8,234,000	$ 2,272,000