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Note 17 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 02, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2020 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares) |  | 25,899 | 83,343 |  |
Gross Proceeds from Stock Options Exercised |  | $ 54 | $ 144 |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable |  | $ 3,431 |  |  |
Preferred Stock, Shares Outstanding, Ending Balance (in shares) |  | 0 | 0 | 0 |
Common Stock, Dividends, Per Share, Declared (in dollars per share) |  | $ 0 | $ 0 |  |
Share Buyback Program [Member] |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  | $ 5,000
Assets Acquisition of Amika Mobile Corporation [Member] |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Each Anniversaries (in shares) | 191,267 | 191,267 |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | 573,801 | 573,801 |  |  |
Business Acquisition, Share Price (in dollars per share) | $ 5.98 |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ 3,431 | $ 3,431 |  |  |

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