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Intangible Assets
 12 Months Ended
Mar. 31, 2021
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, 2021March 31, 2020
 Gross Carrying
Amount		Accumulated
Amortization		Net Intangible Asset Gross Carrying
Amount		Accumulated
Amortization		Net Intangible Asset
Cost of customer lists$54,777,749 (32,322,607)22,455,142 $50,411,969 (27,215,464)23,196,505 
Value assigned to non-compete agreements10,252,143 (9,169,768)1,082,375 10,054,643 (8,802,671)1,251,972 
Total$65,029,892 (41,492,375)23,537,517 $60,466,612 (36,018,135)24,448,477 

The estimated amortization expense for intangible assets for future years ended March 31 is as follows: $4.8 million for 2022; $4.2 million for 2023; $4.0 million for 2024; $3.7 million for 2025; $3.1 million for 2026; and an aggregate of $3.8 million for the years thereafter.