Note 5 - Intangible Assets (Details Textual) - USD ($)	3 Months Ended	9 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Amortization of Intangible Assets	$ 354,000	$ 285,000	$ 1,151,000	$ 726,000
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year	348		348
Finite-Lived Intangible Asset, Expected Amortization, Year One	1,415		1,415
Finite-Lived Intangible Asset, Expected Amortization, Year Two	1,032		1,032
Finite-Lived Intangible Asset, Expected Amortization, Year Three	738,000		738,000
Finite-Lived Intangible Asset, Expected Amortization, Year Four	673,000		673,000
Finite-Lived Intangible Asset, Expected Amortization, Year Five	$ 2,406,000		$ 2,406,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

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+ References

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-Paragraph 2
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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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