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Note 16 - Subsequent Events (Details Textual) - USD ($) |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Feb. 27, 2023 | Feb. 08, 2023 | Nov. 18, 2021 | Apr. 01, 2021 | Dec. 31, 2022 | Jan. 26, 2023
Shares Issued, Price Per Share (in dollars per share) |  |  | $ 6.39 |  |  |
Austin, TX [Member] | Lease for Technology Organization [Member] |  |  |  |  |  |
Lessee, Operating Lease, Term of Contract (Month) |  |  |  |  | 25 months |
Restricted Stock [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  |  | 103,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  |  |  | 10 years |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 141,900 | 103,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  | 3 years | 3 years |  |
Shares Issued, Price Per Share (in dollars per share) |  |  |  | $ 1.08 |  |
Restricted Stock Units (RSUs) [Member] | Chief Financial Officer [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 21,000 |  |  |
Restricted Stock Units (RSUs) [Member] | Director One [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 6,000 |  |  |
Restricted Stock Units (RSUs) [Member] | Director Two [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 12,000 |  |  |
Subsequent Event [Member] |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) |  | $ 1.75 |  |  |  |
Subsequent Event [Member] | Austin, TX [Member] | Lease for Technology Organization [Member] |  |  |  |  |  |
Lessee, Operating Lease, Term of Contract (Month) |  |  |  |  |  | 24 months
Subsequent Event [Member] | Executive Vice President [Member] |  |  |  |  |  |
Annual Base Salary | $ 250,000 |  |  |  |  |
Employment Agreement, Commissions Percentage | 10.00% |  |  |  |  |
Payment of One-time Signing Bonus | $ 40,000 |  |  |  |  |
Subsequent Event [Member] | Restricted Stock [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  | 1,403,000 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  | 10 years |  |  |  |
Subsequent Event [Member] | Restricted Stock [Member] | Chief Executive Officer [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  | 330,000 |  |  |  |
Subsequent Event [Member] | Restricted Stock [Member] | Chief Financial Officer [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  | 200,000 |  |  |  |
Subsequent Event [Member] | Restricted Stock [Member] | Director One [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  | 100,000 |  |  |  |
Subsequent Event [Member] | Restricted Stock [Member] | Director Two [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  | 100,000 |  |  |  |
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  | 273,000 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  | 3 years |  |  |  |
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  | 33,000 |  |  |  |
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] | Chief Financial Officer [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  | 21,000 |  |  |  |
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] | Director One [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  | 12,000 |  |  |  |
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] | Director Two [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  | 12,000 |  |  |  |

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