PROPERTY, PLANT AND EQUIPMENT, NET- additional information (Details) - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Property, Plant and Equipment [Line Items]
Depreciation	$ 749,755	$ 704,284
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	8,792,327	8,298,009
Interest Costs Capitalized	2,466	14,791
Equipment under capital leases
Property, Plant and Equipment [Line Items]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 24,469	$ 13,594