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Goodwill, Long-lived Assets and Other Intangibles (Tables)
 6 Months Ended
Jul. 31, 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
 
(82
)
 
—

 
—

 
(82
)
Balance at July 31, 2019
 
$
16,961

 
$
33,232

 
$
634

 
$
50,827
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, 2019
 
January 31, 2019
 
 
Accumulated
 
 
 
Accumulated
 
 
Amount
amortization
Net
 
Amount
amortization
Net
Existing technology
$
9,172

$
(7,463
)
$
1,709

 
$
9,203

$
(7,216
)
$
1,987

Customer relationships
16,072

(6,188
)
9,884

 
15,791

(5,508
)
10,283

Patents and other intangibles
5,942

(2,162
)
3,780

 
5,908

(1,885
)
4,023

Total
$
31,186

$
(15,813
)
$
15,373

 
$
30,902

$
(14,609
)
$
16,293