STOCKHOLDER'S EQUITY - Common Stock Issued, Net of Issuance Costs (Details) - USD ($)											1 Months Ended				3 Months Ended	9 Months Ended	12 Months Ended		13 Months Ended
	Feb. 11, 2021	Feb. 11, 2021	Feb. 05, 2021	Dec. 04, 2020	Oct. 02, 2020	Jun. 26, 2020	May 21, 2020	Aug. 06, 2019	Jun. 06, 2019	Apr. 14, 2017	Feb. 05, 2021	Jan. 31, 2021	Oct. 31, 2020	May 31, 2019	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2020
Common stock outstanding after the effect of reverse stock spilt conversion																	19,171,859	3,339,380
Common stock, par value																	$ 0.001	$ 0.001
Issuance of common stock, net																	$ 63,614,000	$ 6,652,000
Subsequent Event
Issuance of common stock, net		$ 53,900,000
Common Stock
Number of common stock issued																	15,681,968	1,902,593
December 2020 PA
Maximum aggregate offering price				$ 100,000,000
Period for financing from common stock				36 months
December 2020 PA | Lincoln Park | Subsequent Event
Number of common stock issued	900,000
Issuance of common stock, net	$ 6,600,000
Gross proceeds from issuance of common stock	$ 6,600,000
May 2020 Purchase Agreement with Lincoln Park
Maximum aggregate offering price					$ 3,200,000		$ 12,000,000						$ 12,000,000
Period for financing from common stock							24 months
Number of common stock issued					1,100,000	1,970,000	156,250								1,600,000	1.8
Issuance of common stock, net					$ 8,200,000										$ 3,500,000	$ 3,800,000
Number of warrants issued for common stock							250,000
Warrant purchase price per share							$ 1.2989
2019 Purchase Agreement with Lincoln Park
Maximum aggregate offering price								$ 3,200,000	$ 10,000,000
Period for financing from common stock									24 months
Number of common stock issued																	1,500,000	1,700,000	3,200,000
Issuance of common stock, net																	$ 1,900,000	$ 5,800,000	$ 7,700,000
2019 Purchase Agreement with Lincoln Park | Maximum
Percentage of common stock issuable				19.99%
2019 Purchase Agreement with Lincoln Park | Lincoln Park
Minimum percentage considered for not to sale common stock				9.99%
Securities Purchase Agreement with Lincoln Park
Number of common stock issued														104,294
Aggregate gross proceeds from common shares and warrants														$ 550,751
Warrant purchase price per share														$ 5.062
Securities Purchase Agreement with Lincoln Park | Maximum
Number of warrants issued for common stock														182,515
ATM Offering Agreement | Lincoln Park | Forecast
Number of common stock issued			0
ATM Offering Agreement | Cantor Fitzgerald & Co
Issuance of common stock, net																	$ 49,900,000	$ 400,000
Number of common stock sold																	11,000,000	100,000
ATM Offering Agreement | Cantor Fitzgerald & Co | Subsequent Event
Number of common stock issued												9,300,000
Issuance of common stock, net												$ 47,300,000
ATM Offering Agreement | Cantor Fitzgerald & Co | Forecast
Issuance of common stock, net											$ 47,300,000
Number of common stock sold											9,300,000
ATM Offering Agreement | Cantor Fitzgerald & Co | Maximum
Sales commission percentage										2.50%