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Note 14 - Acquisitions - Consideration Transferred (Details) (Parentheticals) - $ / shares |  |  | 6 Months Ended
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May 28, 2021 | Mar. 01, 2021 | Jun. 30, 2022
Woorank SRL ([Member] |  |  |
Shares issued for acquisition (in shares) |  | 29,433 |
Woorank SRL ([Member] | Common Stock [Member] |  |  |
Shares issued for acquisition (in shares) |  | 29,433 |
Price per share (in dollars per share) |  | $ 3.38 |
The 2021 Acquisitions [Member] | Series D Convertible Preferred Stock [Member] |  |  |
Shares issued for acquisition (in shares) |  |  | 1,500
Price per share (in dollars per share) |  |  | $ 618
The 2021 Acquisitions [Member] | Common Stock [Member] |  |  |
Shares issued for acquisition (in shares) |  |  | 29,433
Price per share (in dollars per share) |  |  | $ 3.38
Hawk Search [Member] | Series D Convertible Preferred Stock [Member] |  |  |
Shares issued for acquisition (in shares) | 1,500 |  |
Price per share (in dollars per share) | $ 618 |  |

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