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Note 3 - Restructuring Costs (Details Textual) |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 10, 2022 USD ($) | May 10, 2022 DKK (kr) | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Restructuring Charges, Total |  |  | $ 1,788,827 | $ 0 | $ 1,788,827 | $ 0 |  |  |
Restructuring Reserve, Ending Balance |  |  | 296,938 | $ 0 | 296,938 | $ 0 |  | $ 0 | $ 0
Capex Commitments [Member] |  |  |  |  |  |  |  |  |
Other Commitment, Total |  |  |  |  |  |  | $ 9,000,000 |  |
CEO Separation [Member] |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  |  |  | 235,139 |  |  |  |
Employee Severance [Member] |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  |  |  | 164,673 |  |  |  |
Facility Closing [Member] |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  |  |  | 286,807 |  |  |  |
Capex Commitments [Member] |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  |  |  | 668,606 |  |  |  |
Restructuring Program [Member] |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  | 1,788,827 |  |  |  |  |  |
Impairment, Long-Lived Asset, Held-for-Use, Total |  |  | 250,424 |  |  |  |  |  |
Inventory Write-down |  |  | 183,179 |  |  |  |  |  |
Restructuring and Related Cost, Incurred Cost |  |  | 1,491,889 |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost Remaining |  |  | 296,938 |  | $ 296,938 |  |  |  |
Restructuring Program [Member] | CEO Separation [Member] |  |  |  |  |  |  |  |  |
Restructuring Charges, Total | $ 235,139 | kr 1,605,000 |  |  |  |  |  |  |
Restructuring Program [Member] | Employee Severance [Member] |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  | $ 164,673 |  |  |  |  |  |
Restructuring and Related Cost, Percentage Reduction |  |  | 25.00% |  | 25.00% |  |  |  |
Restructuring Program [Member] | Facility Closing [Member] |  |  |  |  |  |  |  |  |
Restructuring Charges, Total |  |  | $ 286,807 |  |  |  |  |  |
Restructuring Program [Member] | Capex Commitments [Member] |  |  |  |  |  |  |  |  |
Restructuring Reserve, Ending Balance |  |  | $ 668,606 |  | $ 668,606 |  |  |  |

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