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

6 Months Ended

Jul. 31, 2018

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, 2018	$	12,741		$	33,232	$	737		$	46,710
Divestiture of business	—			—		(103		)	(103		)
Foreign currency translation adjustment	(169		)	—		—			(169		)
Balance at July 31, 2018	$	12,572		$	33,232	$	634		$	46,438

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, 2018							January 31, 2018
			Accumulated							Accumulated
	Amount		amortization			Net		Amount		amortization			Net
Existing technology	$	7,225	$	(7,088	)	$	137	$	7,290	$	(6,996	)	$	294
Customer relationships	12,504		(4,978		)	7,526		13,264		(4,834		)	8,430
Patents and other intangibles	5,741		(1,632		)	4,109		4,241		(2,381		)	1,860
Total	$	25,470	$	(13,698	)	$	11,772	$	24,795	$	(14,211	)	$	10,584