STOCK OPTIONS, RESTRICTED STOCK UNITS (RSUs) AND WARRANTS - Changes in warrants outstanding (Details) - USD ($)	9 Months Ended
	Jun. 30, 2023	Sep. 30, 2022
Exercise price (in dollars per share)	$ 5.80	$ 5.82
Number outstanding	$ 5,383,175	$ 5,300,033
Weighted average remaining contractual life (years)	3 years
Warrant Exercise price 2.58
Exercise price (in dollars per share)	$ 2.58
Number outstanding	$ 100,000
Weighted average remaining contractual life (years)	6 years 3 months 10 days
Weighted average exercise price	$ 2.58
Number exercisable	100,000
Weighted average remaining contractual life (years)	6 years 3 months 10 days
Warrant Exercise price 2.57
Exercise price (in dollars per share)	$ 2.57
Number outstanding	$ 666,666
Weighted average remaining contractual life (years)	3 years 5 months 8 days
Weighted average exercise price	$ 2.57
Number exercisable	666,666
Weighted average remaining contractual life (years)	3 years 5 months 8 days
Warrant Exercise price 2.25
Exercise price (in dollars per share)	$ 2.25
Number outstanding	$ 888,888
Weighted average remaining contractual life (years)	6 years 8 months 12 days
Weighted average exercise price	$ 2.25
Number exercisable	888,888
Weighted average remaining contractual life (years)	6 years 8 months 12 days
Warrant exercise price 8.25
Exercise price (in dollars per share)	$ 8.25
Number outstanding	$ 107,952
Weighted average remaining contractual life (years)	1 year 5 months 1 day
Weighted average exercise price	$ 8.25
Number exercisable	107,952
Weighted average remaining contractual life (years)	1 year 5 months 1 day
Warrant Exercise price 8.40
Exercise price (in dollars per share)	$ 8.40
Number outstanding	$ 16,666
Weighted average remaining contractual life (years)	5 years 9 months 25 days
Weighted average exercise price	$ 8.40
Number exercisable	16,666
Weighted average remaining contractual life (years)	5 years 9 months 25 days
Warrant Exercise price 8.25
Exercise price (in dollars per share)	$ 8.25
Number outstanding	$ 2,191,149
Weighted average remaining contractual life (years)	1 year 3 months
Weighted average exercise price	$ 8.25
Number exercisable	2,191,149
Weighted average remaining contractual life (years)	1 year 3 months
Warrant Exercise price 7.05
Exercise price (in dollars per share)	$ 7.05
Number outstanding	$ 62,438
Weighted average remaining contractual life (years)	3 years 8 months 15 days
Weighted average exercise price	$ 7.05
Warrant exercise price 5.25
Exercise price (in dollars per share)	$ 5.25
Number outstanding	$ 383,141
Weighted average remaining contractual life (years)	1 year 9 months 25 days
Weighted average exercise price	$ 5.25
Number exercisable	383,141
Weighted average remaining contractual life (years)	1 year 9 months 25 days
Warrant Exercise price 5.25
Exercise price (in dollars per share)	$ 5.25
Number outstanding	$ 209,522
Weighted average remaining contractual life (years)	1 year 10 months 13 days
Weighted average exercise price	$ 5.25
Number exercisable	209,522
Weighted average remaining contractual life (years)	1 year 10 months 13 days
Warrant Exercise price 9.00
Exercise price (in dollars per share)	$ 9.00
Number outstanding	$ 66,666
Weighted average remaining contractual life (years)	1 year 10 months 17 days
Weighted average exercise price	$ 9.00
Warrant Exercise price 7.95
Exercise price (in dollars per share)	$ 7.95
Number outstanding	$ 100,000
Weighted average remaining contractual life (years)	1 year 11 months 15 days
Weighted average exercise price	$ 7.95
Warrant Exercise Price 5.25
Exercise price (in dollars per share)	$ 5.25
Number outstanding	$ 296,329
Weighted average remaining contractual life (years)	2 years 29 days
Weighted average exercise price	$ 5.25
Number exercisable	296,329
Weighted average remaining contractual life (years)	2 years 29 days
Warrant Exercise price 6.00
Exercise price (in dollars per share)	$ 6.00
Number outstanding	$ 192,000
Weighted average remaining contractual life (years)	4 years 2 months 26 days
Weighted average exercise price	$ 6.00
Number exercisable	192,000
Weighted average remaining contractual life (years)	4 years 2 months 26 days
Warrant Exercise price 6.00.
Exercise price (in dollars per share)	$ 6.00
Number outstanding	$ 18,616
Weighted average remaining contractual life (years)	4 years 3 months
Weighted average exercise price	$ 6.00
Number exercisable	18,616
Weighted average remaining contractual life (years)	4 years 3 months
Warrant Exercise price 4.33
Exercise price (in dollars per share)	$ 4.33
Number outstanding	$ 83,142
Weighted average remaining contractual life (years)	2 years 10 months 9 days
Weighted average exercise price	$ 4.33
Number exercisable	83,142
Weighted average remaining contractual life (years)	2 years 10 months 9 days