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Intangible Assets
 12 Months Ended
Mar. 31, 2019
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Intangible Assets
Intangible Assets

The following table provides the gross carrying amount and related accumulated amortization of definite-lived intangible assets:
 
March 31, 2019
 
March 31, 2018
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Intangible Asset
 
Gross Carrying
Amount
 
Accumulated
Amortization
 
Net Intangible Asset
 
 
 
 
 
 
 
 
 
 
 
 
Cost of customer lists
$
37,183,018

 
(22,509,921
)
 
14,673,097

 
$
27,494,510

 
(21,098,875
)
 
6,395,635

Value assigned to non-compete agreements
9,164,643

 
(8,497,587
)
 
667,056

 
8,629,643

 
(8,380,977
)
 
248,666

Total
$
46,347,661

 
(31,007,508
)
 
15,340,153

 
$
36,124,153

 
(29,479,852
)
 
6,644,301



The estimated amortization expense for intangible assets for future years ended March 31 is as follows: $2.3 million for 2020; $2.3 million for 2021; $2.3 million for 2022; $2.2 million for 2023; $2.0 million for 2024; and an aggregate of $4.2 million for the years thereafter.