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Note 3 - Acquisitions (Details Textual) $ in Millions |  |  |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 21, 2021 USD ($) | Dec. 21, 2021 CAD ($) | Oct. 28, 2021 USD ($) | Oct. 06, 2021 USD ($) shares | Jun. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2022 CAD ($) | Dec. 31, 2021 USD ($) | Dec. 21, 2021 CAD ($)
Z-Sciences [Member] |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  |  |  | $ 500,000 |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  | 300,000 |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Total |  |  |  | $ 200,000 | $ 179,000 | $ 179,000 |  |  |
Z-Sciences [Member] | Restricted Stock Award [Member] | Achieving Future Performance Milestones [Member] |  |  |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Vesting Percentage |  |  |  | 100.00% |  |  |  |  |
Z-Sciences [Member] | Maximum [Member] | Restricted Stock Award [Member] | Achieving Future Performance Milestones [Member] |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable |  |  |  | $ 1,800,000 |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares |  |  |  | 200,000 |  |  |  |  |
Videology [Member] |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  | $ 12,000,000 |  |  |  |  |  |
Business Acquisition, Transaction Costs |  |  | $ 288,000 |  |  |  |  |  |
Acculogic [Member] |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total | $ 9,426,000 |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross | 8,500 |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Total | 1,430,000 |  |  |  | 1,435,000 | 1,435,000 |  |  |
Business Acquisition, Transaction Costs |  |  |  |  |  |  |  | $ 1,297,000 |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets |  |  |  |  | $ (371,000) |  |  |  |
Acculogic [Member] | Payments Based on Performance Metrics [Member] |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Total | $ 1,430,000 |  |  |  |  |  |  |  | $ 5.0
Minimum Amount Required for Invoices Received |  | $ 2.5 |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High |  |  |  |  |  | $ 3,900 | $ 5.0 |  |

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