Note 16 - Stockholders' Equity (Details Textual) - USD ($)			3 Months Ended		12 Months Ended
	Oct. 04, 2023	Oct. 02, 2020	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Issuance of common stock upon exercise of stock options, net (in shares)			0	20,000
Issuance of common stock upon vesting of restricted stock units (in shares)			10,000	12,667
Gross Proceeds from Stock Options Exercised			$ 0	$ 32,000
Underwritten Public Offering, Common Stock	5,750,000
Price Per Share, Underwritten Agreement	$ 2
Gross Proceeds From Underwritten Public Offering, Common Stock	$ 11,500,000
Payments of Stock Issuance Costs	$ 1,051,000
Share Price			$ 2.03
Stock Issued During Period, Value, Acquisitions			$ 1,924,000
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock			$ 527,000
Common Stock, Dividends, Per Share, Declared (in dollars per share)			$ 0	$ 0
Share Buyback Program [Member]
Stock Repurchase Program, Authorized Amount				$ 5,000,000,000
Stock Repurchased and Retired During Period, Shares (in shares)			0	0
Additional Paid-in Capital [Member]
Stock Issued During Period, Value, Acquisitions			$ 1,924,000
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock			$ 527,000
Evertel Technologies, LLC [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	986,486
Share Price	$ 1.95
Evertel Technologies, LLC [Member] | Agreement to Issue Stock [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	270,270
Share Price	$ 1.95
Evertel Technologies, LLC [Member] | Additional Paid-in Capital [Member]
Stock Issued During Period, Value, Acquisitions	$ 1,924
Evertel Technologies, LLC [Member] | Additional Paid-in Capital [Member] | Agreement to Issue Stock [Member]
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock	$ 527,000
Assets Acquisition of Amika Mobile Corporation [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)		573,801	69,564		69,564
Share Price		$ 5.98
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Each Anniversaries		191,267
Business Acquisition, Share Price		$ 5.98
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 3,431,000
Assets Acquisition of Amika Mobile Corporation [Member] | Former Owner of Amika Mobile [Member]
Stock Issued During Period, Shares, Acquisitions			69,564		69,564	69,564	365,109