INVENTORIES - Additional information (Details)		6 Months Ended	12 Months Ended
		Sep. 30, 2020 USD ($) item	Mar. 31, 2020 USD ($)
Public Utilities, Inventory [Line Items]
Inventories		$ 812,748	$ 1,000,675
Inventory Write-down		0	0
Automobiles [Member]
Public Utilities, Inventory [Line Items]
Inventories	[1]	$ 812,748	$ 1,000,675
Automobiles Under Finance Lease [Member]
Public Utilities, Inventory [Line Items]
Number Of Inventory Units | item		2
Inventories		$ 25,959
Automobiles Under Operating Lease [Member]
Public Utilities, Inventory [Line Items]
Number Of Inventory Units | item		15
Inventories		$ 387,544
Automobiles For Either Leasing Or Sale [Member]
Public Utilities, Inventory [Line Items]
Number Of Inventory Units | item		30
Inventories		$ 399,245

[1] As of September 30, 2020, the Company owned two automobiles with an aggregate value of $25,959 for sale, fifteen automobiles with a total value of $387,544 for operating lease, and 30 automobiles with a total value of $399,245 for either leasing or sale.