Goodwill, Long-lived Assets and Other Intangibles (Tables)

9 Months Ended

Oct. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

The changes in the carrying amount of goodwill by reporting unit were as follows:

	Applied Technology		Engineered Films		Aerostar			Total
Balance at January 31, 2017	$	12,342	$	27,518	$	789		$	40,649
Additions due to business combinations	—		5,941		—			5,941
Divestiture of business	—		—		(52		)	(52		)
Foreign currency translation adjustment	214		—		—			214
Balance at October 31, 2017	$	12,556	$	33,459	$	737		$	46,752
Balance at January 31, 2016	$	12,365	$	27,518	$	789		$	40,672
Foreign currency translation adjustment	31		—		—			31
Balance at October 31, 2016	$	12,396	$	27,518	$	789		$	40,703

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The following table provides the gross carrying amount and related accumulated amortization of definite-lived intangible assets:

	October 31, 2017							January 31, 2017							October 31, 2016
			Accumulated							Accumulated							Accumulated
	Amount		amortization			Net		Amount		amortization			Net		Amount		amortization			Net
Existing technology	$	7,218	$	(6,854	)	$	364	$	7,136	$	(6,553	)	$	583	$	7,157	$	(6,490	)	$	667
Customer relationships	13,220		(4,503		)	8,717		12,987		(3,680		)	9,307		13,000		(3,421		)	9,579
Patents and other intangibles	4,708		(2,414		)	2,294		4,378		(2,220		)	2,158		4,427		(2,162		)	2,265
Total	$	25,146	$	(13,771	)	$	11,375	$	24,501	$	(12,453	)	$	12,048	$	24,584	$	(12,073	)	$	12,511