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SHAREHOLDERS' EQUITY (Summary of Stock Option Outstanding) (Details)	6 Months Ended
	Mar. 31, 2021 $ / shares shares	Mar. 31, 2021 $ / shares shares	Sep. 30, 2020 $ / shares shares	Sep. 30, 2019 $ / shares shares
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares	$ 4.53		$ 3.42	$ 4.59
Number of options | shares	6,726,642	6,726,642	5,309,584	1,122,461
Weighted average remaining contractual life (years)	8 years 7 months 6 days
Exercise Price $2.20 [Member]
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares	$ 2.20
Number of options | shares	4,584	4,584
Weighted average remaining contractual life (years)	8 years 2 months 12 days
Exercise Price $3.23 [Member]
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares	$ 3.23
Number of options | shares	3,823,775	3,823,775
Weighted average remaining contractual life (years)	8 years 6 months 7 days
Exercise Price $3.59 [Member]
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares	$ 3.59
Number of options | shares	26,667	26,667
Weighted average remaining contractual life (years)	8 years 6 months 18 days
Exercise Price $3.81 [Member]
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares	$ 3.81
Number of options | shares	185,816	185,816
Weighted average remaining contractual life (years)	7 years 10 months 13 days
Exercise Price $4.00 [Member]
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares	$ 4.00
Number of options | shares	539,518	539,518
Weighted average remaining contractual life (years)	6 years 8 months 23 days
Exercise Price $4.67 [Member]
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares	$ 4.67
Number of options | shares	208,511	208,511
Weighted average remaining contractual life (years)	8 years 7 months 2 days
Exercise Price $7.00 [Member]
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares	$ 7.00
Number of options | shares	1,524,646	1,524,646
Weighted average remaining contractual life (years)	9 years 8 months 12 days
Exercise Price $13.96 [Member]
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares		$ 13.96
Number of options | shares	190,000	190,000
Weighted average remaining contractual life (years)	9 years 9 months 14 days
Exercise Price C$4.90 [Member]
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares		$ 4.90
Number of options | shares	183,845	183,845
Weighted average remaining contractual life (years)	6 years 4 months 17 days
Exercise Price C$5.06 [Member]
SHAREHOLDERS' EQUITY
Stock options, Exercise price | $ / shares	$ 5.06
Number of options | shares	39,280	39,280
Weighted average remaining contractual life (years)	7 years 10 months 13 days

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of options outstanding, including both vested and non-vested options.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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