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

6 Months Ended

Jul. 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
Divestiture of business	—		—		(52		)	(52		)
Foreign currency translation adjustment	244		—		—			244
Balance at July 31, 2017	$	12,586	$	27,518	$	737		$	40,841
Balance at January 31, 2016	$	12,365	$	27,518	$	789		$	40,672
Foreign currency translation adjustment	80		—		—			80
Balance at July 31, 2016	$	12,445	$	27,518	$	789		$	40,752

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:

	July 31, 2017							January 31, 2017							July 31, 2016
			Accumulated							Accumulated							Accumulated
	Amount		amortization			Net		Amount		amortization			Net		Amount		amortization			Net
Existing technology	$	7,230	$	(6,775	)	$	455	$	7,136	$	(6,553	)	$	583	$	7,175	$	(6,423	)	$	752
Customer relationships	12,787		(4,206		)	8,581		12,987		(3,680		)	9,307		13,012		(3,160		)	9,852
Patents and other intangibles	4,530		(2,338		)	2,192		4,378		(2,220		)	2,158		4,352		(2,068		)	2,284
Total	$	24,547	$	(13,319	)	$	11,228	$	24,501	$	(12,453	)	$	12,048	$	24,539	$	(11,651	)	$	12,888