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Note 16 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Oct. 02, 2020 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Mar. 18, 2021 | Mar. 17, 2021 | Dec. 31, 2018
Common Stock, Shares Authorized (in shares) |  | 100,000,000 | 100,000,000 |  | 100,000,000 | 50,000,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period |  | 84,765 | 145,235 |  |  |  |
Gross Proceeds from Stock Options Exercised |  | $ 138 | $ 282 |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures |  |  | 270,262 |  |  |  |
Preferred Stock, Shares Authorized |  | 5,000,000 | 5,000,000 |  |  |  |
Preferred Stock, Par or Stated Value Per Share |  | $ 0.00001 | $ 0.00001 | $ 0.00001 |  |  |
Preferred Stock, Shares Outstanding, Ending Balance (in shares) |  | 0 | 0 |  |  |  |
Share Buyback Program [Member] |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  |  | 259,310 |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  | $ 5,000
Stock Repurchased During Period, Value |  |  | $ 998 |  |  |  |
Assets Acquisition of Amika Mobile Corporation [Member] |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Each Anniversaries | 191,267 |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | 573,801 | 69,564 |  |  |  |  |
Business Acquisition, Share Price | $ 5.98 |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ 3,431 |  |  | $ 3,431 |  |  |
Assets Acquisition of Amika Mobile Corporation [Member] | Former Owner of Amika Mobile [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions |  | 69,564 | 69,564 | 365,109 |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures |  | 253,012 |  |  |  |  |
Share-Based Payment Arrangement, Employee [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period |  | 162,841 |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises, Net Share Settlement Transaction |  | 816,747 |  |  |  |  |
Stock Used as Consideration of Option Exercises |  | 579,300 |  |  |  |  |
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  | 74,606 |  |  |  |  |
Share-Based Payment Arrangement, Employee [Member] | Incentive Stock Options [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period |  | 150,753 |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  | 109,488 |  |  |  |  |

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