STOCK-BASED COMPENSATION, Summary of Stock Options (Details) - USD ($)	9 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020
Selling, General and Administrative Expenses [Member]
Aggregate Intrinsic Value [Abstract]
Stock-based compensation	$ 35,000	$ 163,000
Indco's [Member]
Number of Options [Roll Forward]
Outstanding, beginning balance (in shares)	39,013
Granted (in shares)	6,948
Exercised (in shares)	(7,000)
Outstanding, ending balance (in shares)	38,961		39,013
Exercisable, ending balance (in shares)	25,153
Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning balance (in dollars per share)	$ 9.24
Granted (in dollars per share)	12.29
Exercised (in dollars per share)	6.48
Outstanding, ending balance (in dollars per share)	10.28		$ 9.24
Exercisable, ending balance (in dollars per share)	$ 9.42
Weighted Average Remaining Contractual Term [Abstract]
Outstanding	6 years 10 months 13 days		6 years 9 months 21 days
Granted	9 years 6 months
Exercisable	5 years 11 months 4 days
Aggregate Intrinsic Value [Abstract]
Outstanding, beginning balance	$ 85,450
Granted	0
Outstanding, ending balance	78,160		$ 85,450
Exercisable, ending balance	$ 72,250
Share price (in dollars per share)	$ 12.29
Total unrecognized compensation expense	$ 51,000
Accrued compensation cost	344,000		$ 284,000
Indco's [Member] | Selling, General and Administrative Expenses [Member]
Aggregate Intrinsic Value [Abstract]
Stock-based compensation	$ 50,000	$ 54,000
Indco's [Member] | Maximum [Member]
Aggregate Intrinsic Value [Abstract]
Weighted-average vesting period	1 year
Employee Option Awards [Member]
Number of Options [Roll Forward]
Outstanding, beginning balance (in shares)	93,996
Granted (in shares)	7,500
Exercised (in shares)	(2,502)
Outstanding, ending balance (in shares)	98,994		93,996
Exercisable, ending balance (in shares)	83,998
Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning balance (in dollars per share)	$ 5.76
Granted (in dollars per share)	9.00
Exercised (in dollars per share)	8.58
Outstanding, ending balance (in dollars per share)	5.93		$ 5.76
Exercisable, ending balance (in dollars per share)	$ 5.42
Weighted Average Remaining Contractual Term [Abstract]
Outstanding	4 years 9 months 14 days		5 years 2 months 26 days
Granted	9 years 6 months
Exercisable	4 years 1 month 9 days
Aggregate Intrinsic Value [Abstract]
Outstanding, beginning balance	$ 304,990
Granted	0
Outstanding, ending balance	1,194,410		$ 304,990
Exercisable, ending balance	$ 1,056,320
Share price (in dollars per share)	$ 18.00
Total unrecognized compensation expense	$ 40,000
Employee Option Awards [Member] | Maximum [Member]
Aggregate Intrinsic Value [Abstract]
Weighted-average vesting period	1 year
Non-Employee Option [Member]
Number of Options [Roll Forward]
Outstanding, beginning balance (in shares)	6,053
Exercised (in shares)	(6,053)
Outstanding, ending balance (in shares)	0		6,053
Exercisable, ending balance (in shares)	0
Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning balance (in dollars per share)	$ 4.13
Exercised (in dollars per share)	0
Outstanding, ending balance (in dollars per share)	0		$ 4.13
Exercisable, ending balance (in dollars per share)	$ 0
Weighted Average Remaining Contractual Term [Abstract]
Outstanding			6 years
Aggregate Intrinsic Value [Abstract]
Outstanding, beginning balance	$ 29,480
Outstanding, ending balance	0		$ 29,480
Exercisable, ending balance	0
Share price (in dollars per share)			$ 9.00
Unrecognized compensation expense, vested stock options	$ 0