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Note 17 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 07, 2021 | Oct. 02, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | 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 (in shares) |  |  | 104,796 | 583,019 |  |  |
Gross Proceeds from Stock Options Exercised |  |  | $ 211 | $ 1,136 |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total (in shares) |  |  | 228,633 | 198,106 |  |  |
Share Price (in dollars per share) | $ 5.05 | $ 5.98 | $ 5.18 |  |  |  |
Preferred Stock, Shares Authorized (in shares) |  |  | 5,000,000 | 5,000,000 |  |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) |  |  | $ 0.00001 | $ 0.00001 |  |  |
Preferred Stock, Shares Outstanding, Ending Balance (in shares) |  |  | 0 | 0 |  |  |
Stock Repurchased During Period, Value |  |  |  | $ 398 |  |  |
Share Buyback Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  | $ 5,000
Stock Repurchased and Retired During Period, Shares (in shares) |  |  | 0 | 156,505 |  |  |
Stock Repurchased During Period, Value |  |  |  | $ 398 |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  | $ 4,100 |  |  |  |
Assets Acquisition of Amika Mobile Corporation [Member] |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Each Anniversaries (in shares) |  | 191,267 |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) |  | 573,801 | 208,692 |  |  |  |
Business Acquisition, Share Price (in dollars per share) |  | $ 5.98 |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable |  | $ 3,431 |  |  |  |  |
Assets Acquisition of Amika Mobile Corporation [Member] | Former Owner of Amika Mobile [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions (in shares) |  |  | 365,109 |  |  |  |
Zonehaven, Inc [Member] |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | 2,165,824 |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ 10,938 |  | $ 10,938 | $ (0) |  |  |

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