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Goodwill, Long-lived Assets and Other Intangibles Goodwill, Long-lived Assets and Other Intangibles (Notes)
 3 Months Ended
Apr. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Impairment Loss and Other Charges GOODWILL, LONG-LIVED ASSETS, AND OTHER CHARGES

Goodwill
Management assesses goodwill for impairment annually during the fourth quarter and between annual tests whenever a triggering event indicates there may be an impairment. Impairment tests of goodwill are done at the reporting unit level. Management performed an assessment in the first quarter of fiscal 2020 and determined that no triggering events had occurred for any of the Company's reporting units. There were no goodwill impairment losses reported in the three-month periods ending April 30, 2019 and 2018, respectively.

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



Long-lived Assets and Other Intangibles
The Company assesses the recoverability of long-lived assets, including definite-lived intangibles and property plant and equipment, if events or changes in circumstances indicate that an asset might be impaired. For long-lived and intangible assets, management performs impairment reviews by asset group. Management periodically assesses for triggering events and discusses any significant changes in the utilization of long-lived assets. For purposes of recognition and measurement of an impairment loss, a long-lived asset is grouped with other assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities.

When performing long-lived asset testing, the fair values of assets are determined based on valuation techniques using the best available information. Such valuations are derived from valuation techniques in which one or more significant inputs are not observable (Level 3 fair value measures). An impairment loss is recognized when the estimated undiscounted cash flows used in determining the fair value of the asset are less than its carrying amount.

Fiscal 2020 and 2019
Management performed an assessment in the fiscal 2020 and fiscal 2019 first quarter and determined that there were no impairment indicators identified for any of the Company's asset groups. There were no long-lived asset impairment losses reported in the three-month period ending April 30, 2019 and 2018, respectively.

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