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Note 5 - Acquisitions (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 18, 2021 | May 12, 2021 | May 27, 2020 | May 05, 2020 | Nov. 30, 2020 | Jun. 08, 2020 | Apr. 08, 2020
Stock Issued During Period, Value, Acquisitions |  |  |  |  | $ 554 |  |
Share Price (in dollars per share) |  |  |  |  |  | $ 6.00 | $ 2.50
Ballistipax [Member] |  |  |  |  |  |  |
Asset Acquisition, Consideration Transferred, Total | $ 342 |  |  |  |  |  |
Roboro [Member] |  |  |  |  |  |  |
Asset Acquisition, Consideration Transferred, Total |  | $ 3,702 |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  | 100.00% |  |  |
Business Combination, Consideration Transferred, Total |  |  |  | $ 600 |  |  |
Payments to Acquire Businesses, Gross |  |  |  | 500 |  |  |
Business Acquisition, Restricted Shares Issued, Vesting Period (Month) |  |  | 15 months |  |  |  |
Equity Issued in Business Combination, Fair Value Disclosure |  |  |  | $ 600 |  |  |
Share Price (in dollars per share) |  |  |  | $ 4.00 |  |  |
Roboro [Member] | Subscription Agreements [Member] |  |  |  |  |  |  |
Shares, Acquisitions During Period (in shares) |  |  |  | 138,889 |  |  |
Stock Issued During Period, Value, Acquisitions |  |  |  | $ 500 |  |  |
Business Acquisition, Share Price (in dollars per share) |  |  |  | $ 3.60 |  |  |
Kore [Member] |  |  |  |  |  |  |
Asset Acquisition, Consideration Transferred, Total |  | 3,700 |  |  |  |  |
Asset Acquisition, Consideration Transferred, Transaction Cost |  | $ 200 |  |  |  |  |

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- Definition Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 50 -Section 30 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123362884&loc=d3e9215-128498 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 50 -Section 55 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6829253&loc=SL6831962-166255 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 50 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123385561&loc=d3e9135-128495 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 50 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123362884&loc=d3e9212-128498 + Details
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