LIQUIDITY (Details) - USD ($)			1 Months Ended				2 Months Ended	3 Months Ended	12 Months Ended
	Apr. 14, 2021	Dec. 18, 2020	Dec. 31, 2021	Aug. 31, 2021	Apr. 30, 2021	Dec. 31, 2020	Aug. 31, 2021	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Net loss									$ (20,902,000)	$ (20,333,000)
Net cash used in operating activities									(20,441,000)	(24,168,000)
Accumulated deficit								$ (168,138,000)	(168,138,000)	(147,236,000)
Cash, cash equivalents and restricted cash								41,047,000	41,047,000	9,955,000	$ 11,573,000	$ 11,573,000
Total liabilities								16,510,000	16,510,000	3,600,000
Stock Issued During Period, Value, New Issues									41,000,000
Common stock									0	24,050,000
Restricted Cash										$ 0
EDA
Stock Issued During Period, Value, New Issues		$ 50,000,000				$ 50,000,000
LPC Purchase Agreement
Cash and cash equivalents balance plus the net proceeds from the private placement								41,000,000	41,000,000
2021 Financing
Net loss									20,900,000
Net cash used in operating activities									20,400,000
Accumulated deficit								168,100,000	168,100,000
Cash, cash equivalents and restricted cash								41,000,000	41,000,000
Total liabilities								$ 2,000,000	$ 2,000,000
Subsequent events | EDA
Number of shares issued							138,388
Common stock							$ 1,500,000
Subsequent events | LPC Purchase Agreement
Number of shares issued				95,708
Stock Issued During Period, Value, New Issues				$ 20,000,000
Common stock				$ 1,000,000
Loan and security agreement
Gross proceeds from private placement of equity shares					$ 15,000,000
Stated interest rate	8.75%
Variable margin rate	0.12%							0.12%
Loan and security agreement | Subsequent events
Restricted Cash			$ 5,000,000
Stated interest rate			8.75%
Variable margin rate			0.12%
Warrants
Class of Warrant or Right, Number of Securities Called by Warrants or Rights					30,000,000