Goodwill and Long-Lived Asset Impairment Loss and Other Charges (Goodwill Changes) (Details) - USD ($)		3 Months Ended		9 Months Ended
		Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Goodwill [Roll Forward]
Balance at beginning of period				$ 52,148,000
Purchase price adjustment to acquired goodwill(a)	[1]			206,000
Goodwill disposed from sale of business				(69,000)
Goodwill impairment loss (as restated)		$ (11,497,000)	$ 0	(11,497,000)	$ 0
Foreign currency translation adjustment				(76,000)
Balance at end of period		40,712,000	25,234,000	40,712,000	25,234,000
Applied Technology [Member]
Goodwill [Roll Forward]
Balance at beginning of period				12,550,000
Purchase price adjustment to acquired goodwill(a)	[1]			0
Goodwill disposed from sale of business				(69,000)
Goodwill impairment loss (as restated)				0
Foreign currency translation adjustment				(76,000)
Balance at end of period		12,405,000		12,405,000
Engineered Films [Member]
Goodwill [Roll Forward]
Balance at beginning of period				27,312,000
Purchase price adjustment to acquired goodwill(a)	[1]			206,000
Goodwill disposed from sale of business				0
Goodwill impairment loss (as restated)				0
Foreign currency translation adjustment				0
Balance at end of period		27,518,000		27,518,000
Aerostar [Member]
Goodwill [Roll Forward]
Balance at beginning of period				789,000
Purchase price adjustment to acquired goodwill(a)	[1]			0
Goodwill disposed from sale of business				0
Goodwill impairment loss (as restated)				0
Foreign currency translation adjustment				0
Balance at end of period		789,000		789,000
Vista [Member]
Goodwill [Roll Forward]
Balance at beginning of period				11,497,000
Purchase price adjustment to acquired goodwill(a)	[1]			0
Goodwill disposed from sale of business				0
Goodwill impairment loss (as restated)		(11,497,000)	0	(11,497,000)	0
Foreign currency translation adjustment				0
Balance at end of period		$ 0	$ 11,497,000	$ 0	$ 11,497,000

[1] Working capital adjustment and final deferred tax adjustment for Integra acquisition (see Note 6 Acquisitions of and Investments in Businesses and Technologies).