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Note 15 - Commitments and Contingencies (Details Textual) $ / shares in Units, $ in Thousands, $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 02, 2020 USD ($) $ / shares shares | Oct. 02, 2020 CAD ($) shares | Sep. 30, 2021 USD ($) $ / shares shares | Sep. 30, 2020 USD ($) | Jun. 07, 2021 $ / shares
Increase (Decrease) in Other Employee-Related Liabilities | $ |  |  | $ 2,625 | $ 1,554 |
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ |  |  | $ 219 | $ 206 |
Share Price (in dollars per share) | $ / shares | $ 5.98 |  | $ 5.18 |  | $ 5.05
Assets Acquisition of Amika Mobile Corporation [Member] |  |  |  |  |
Asset Purchase Agreement, Deduction From Liability | $ 787 | $ 1 |  |  |
Asset Purchase Agreement, Deduction, Term (Year) | 3 years | 3 years |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Each Anniversaries (in shares) | shares | 191,267 | 191,267 |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares | 573,801 | 573,801 | 208,692 |  |
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) | shares |  |  | 365,109 |  |

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