11. STOCK-BASED COMPENSATION - Schedule of Option Summary (Details) - $ / shares	6 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Equity [Abstract]
Number of Option Shares, Beginning Balance	1,418,938
Options granted	50,000
Options expired	(44,600)
Options canceled/forfeited	(134,656)
Options exercised	0	(99,230)
Number of Option Shares, Ending Balance	1,289,682
Weighted Average Exercise Price, Beginning Balance	$ 19.11
Weighted Average Exercise Price, Options granted	3.27
Weighted Average Exercise Price, Options expired	6.05
Weighted Average Exercise Price, Options canceled/forfeited	12.73
Weighted Average Exercise Price, Options exercised	0
Weighted Average Exercise Price, Ending Balance	$ 19.61

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Weighted average price of options that were either forfeited or expired.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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

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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 price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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