Note 16 - Stockholders' Equity (Details Textual) - USD ($)				3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2024	Oct. 04, 2023	Oct. 02, 2020	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2022
Issuance of common stock upon exercise of stock options, net (in shares)						0	69,679
Issuance of common stock upon vesting of restricted stock units (in shares)						232,387	233,812
Gross Proceeds from Stock Options Exercised						$ 0	$ 86,000
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	$ 2.37			$ 2.37		$ 2.37
Stock Issued During Period, Value, Acquisitions					$ 1,924,000
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock				$ 158,000	527,000
Common Stock, Dividends, Per Share, Declared (in dollars per share)						$ 0	$ 0
Share Buyback Program [Member]
Share Repurchase Program, Authorized, Amount											$ 5,000,000
Stock Repurchased and Retired During Period, Shares (in shares)						0	0
Contingent Consideration Liability [Member]
Stock Issued During Period, Value, Acquisitions				656,000
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				158,000	$ 527,000
Additional Paid-in Capital [Member] | Contingent Consideration Liability [Member]
Stock Issued During Period, Value, Acquisitions				656,000
Evertel Technologies, LLC [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)		986,486
Share Price		$ 1.95
Business Acquisition, Obligation to Issue Common Stock				81,083
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock				158,000
Evertel Technologies, LLC [Member] | Contingent Consideration Liability [Member]
Stock Issued During Period, Shares, Acquisitions	236,343					236,343
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
Increase in Additional Paid-in Capital, Obligation to Issue Common Stock		527,000		$ 158,000
Evertel Technologies, LLC [Member] | Additional Paid-in Capital [Member] | Contingent Consideration Liability [Member]
Stock Issued During Period, Value, Acquisitions						$ 656,000
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