SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Net loss per share (Details) - shares	9 Months Ended	12 Months Ended
Jun. 30, 2023	Sep. 30, 2022
Total common stock equivalents	15,040,739	14,364,616
Options to purchase common stock
Total common stock equivalents	8,555,560	8,174,583
Warrants to purchase common stock
Total common stock equivalents	5,383,175	5,300,033
Restricted Stock Units (RSUs)
Total common stock equivalents	1,102,004	890,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482662/260-10-50-1

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration