Goodwil, Long-lived Assets, and Other Charges (Tables)

12 Months Ended

Jan. 31, 2019

The changes in the carrying amount of goodwill by reporting unit are shown below:



	Applied Technology			Engineered Films		Aerostar			Total
Balance at January 31, 2017	$	12,342		$	27,518	$	789		$	40,649
Additions due to business combinations	—			5,714		—			5,714
Divestiture of business	—			—		(52		)	(52		)
Foreign currency translation adjustment	399			—		—			399
Balance at January 31, 2018	12,741			33,232		737			46,710
Additions due to business combinations	4,559			—		—			4,559
Divestiture of business	—			—		(103		)	(103		)
Foreign currency translation adjustment	(224		)	—		—			(224		)
Balance at January 31, 2019	$	17,076		$	33,232	$	634		$	50,942

Goodwill gross and net of accumulated impairment losses were as follows:



	As of January 31,
	2019			2018
Gross goodwill	$	62,439		$	58,207
Accumulated impairment loss	(11,497		)	(11,497		)
Net goodwill	$	50,942		$	46,710

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



	For the years ended January 31,
	2019							2018
			Accumulated							Accumulated
	Amount		amortization			Net		Amount		amortization			Net
Existing technology	$	9,203	$	(7,216	)	$	1,987	$	7,290	$	(6,996	)	$	294
Customer relationships	15,791		(5,508		)	10,283		13,264		(4,834		)	8,430
Patents and other intangibles	5,908		(1,885		)	4,023		4,241		(2,381		)	1,860
Total	$	30,902	$	(14,609	)	$	16,293	$	24,795	$	(14,211	)	$	10,584

The estimated future amortization expense for these definite-lived intangible assets during the next five years is as follows:



	2020		2021		2022		2023		2024
Estimated amortization expense	$	2,425	$	2,358	$	2,300	$	2,235	$	1,711