SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of assets and liabilities (Details) - USD ($)	6 Months Ended	12 Months Ended
	Sep. 30, 2020	Mar. 31, 2020
Class of Warrant or Right [Line Items]
Beginning balance	$ 342,530
Derivative liabilities recognized at grant date	241,919	$ 3,150,006
Change in fair value of derivative liabilities	412,941	(1,796,724)
Fair value of warrants exercised	1,067,415
Ending balance	940,728	342,530
Series A warrants
Class of Warrant or Right [Line Items]
Fair value of warrants exercised	$ (56,662)
Series B Warrants [Member]
Class of Warrant or Right [Line Items]
Fair value of warrants exercised		$ (1,010,752)