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Goodwill, Long-lived Assets and Other Intangibles (Tables)
 3 Months Ended
Apr. 30, 2019
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, 2019
 
$
17,076

 
$
33,232

 
$
634

 
$
50,942

Changes due to business combinations
 
(33
)
 
—

 
—

 
(33
)
Foreign currency translation adjustment
 
(64
)
 
—

 
—

 
(64
)
Balance at April 30, 2019
 
$
16,979

 
$
33,232

 
$
634

 
$
50,845
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:
 
April 30, 2019
 
January 31, 2019
 
 
Accumulated
 
 
 
Accumulated
 
 
Amount
amortization
Net
 
Amount
amortization
Net
Existing technology
$
9,179

$
(7,345
)
$
1,834

 
$
9,203

$
(7,216
)
$
1,987

Customer relationships
16,076

(5,848
)
10,228

 
15,791

(5,508
)
10,283

Patents and other intangibles
5,941

(2,025
)
3,916

 
5,908

(1,885
)
4,023

Total
$
31,196

$
(15,218
)
$
15,978

 
$
30,902

$
(14,609
)
$
16,293