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Other Intangible Assets
3 Months Ended
Jun. 30, 2021
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Other Intangible Assets OTHER INTANGIBLE ASSETS
Other intangible assets consisted of the following (in thousands):
Estimated
Useful Life
(in years)
As of
June 30, 2021March 31, 2021
Indefinite-lived trademarksN/A$9,052 $9,052 
Patents7to241,443 1,443 
10,495 10,495 
Accumulated amortization - definite-lived intangible assets(1,145)(1,130)
Other intangible assets, net$9,350 $9,365 

Amortization expense was as follows (in thousands):
Three-Months Ended June 30,
20212020
Amortization expense$15 $803 
Future amortization of definite-lived intangible assets is as follows (in thousands):
2022$46 
202361 
202461 
202561 
202647 
Thereafter22 
$298