Note 6 - Fair Value Measurements - Holdback Liability Measured at Fair Value on a Non-recurring Basis (Details) - Evertel Technologies, LLC [Member] $ in Thousands	6 Months Ended
Mar. 31, 2024 USD ($)
Settlement of contingent consideration liability	$ (874)
Fair Value, Nonrecurring [Member] \| Holdback Liability [Member]
Balance	230
Accretion	10
Balance	240
Fair Value, Nonrecurring [Member] \| Contingent Consideration Liability [Member]
Balance	890
Accretion	44
Settlement of contingent consideration liability	(874)
Balance	$ 60

Fair value of obligations not classified as financial liabilities. Includes, but is not limited to, accounts payable and accrued liabilities, commitments, obligations, and other liabilities.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant