SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair value of warrants (Details)	Jun. 21, 2019 shares	Sep. 30, 2020 Y	Sep. 30, 2020 $ / shares	Sep. 30, 2020 shares	Sep. 30, 2020	Aug. 04, 2020 $ / shares shares	Jul. 09, 2020 shares	Mar. 31, 2020 $ / shares shares	Jun. 20, 2019 $ / shares shares
Class of Warrant or Right [Line Items]
Shares Offered During Period, New Issuance | shares	1,781,361
Series A warrants
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares	1,336,021			1,286,021			50,000	1,336,021	1,336,021
Series B Warrants [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares	1,116,320							3,132	1,116,320
Placement Agent Warrants [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares				142,509				142,509	142,509
Placement Agent Warrants [Member] | Maximum [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares	142,509
Underwriter Warrant [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares				568,000		568,000
Exercise price [Member] | Series A warrants
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input			0.50					1.50	3.72
Exercise price [Member] | Series B Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input								0.0001	3.72
Exercise price [Member] | Placement Agent Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input			0.50					3.38	3.38
Exercise price [Member] | Underwriter Warrant [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input			0.63			0.63
Stock price [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input									2.80
Stock price [Member] | Series A warrants
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input			0.61					0.44	2.8
Stock price [Member] | Series B Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input								0.44	2.8
Stock price [Member] | Placement Agent Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input			0.61					0.44	2.8
Stock price [Member] | Underwriter Warrant [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input			0.61			0.51
Expected term [Member] | Series A warrants
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input		4			2.72			3.22	4
Expected term [Member] | Series B Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input		1						0.22	1
Expected term [Member] | Placement Agent Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input		4			2.72			3.22	4
Expected term [Member] | Underwriter Warrant [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					4.85	5
Risk-free interest rate [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					1.77
Risk-free interest rate [Member] | Series A warrants
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					0.15			0.30	1.77
Risk-free interest rate [Member] | Series B Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input								0.11	1.91
Risk-free interest rate [Member] | Placement Agent Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					0.15			0.30	1.77
Risk-free interest rate [Member] | Underwriter Warrant [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					0.27	0.19
Expected volatility [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					86
Expected volatility [Member] | Series A warrants
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					129			122	86
Expected volatility [Member] | Series B Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input								127	91
Expected volatility [Member] | Placement Agent Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					129			122	86
Expected volatility [Member] | Underwriter Warrant [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					129	129