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Note 6 - Related-party Transactions (Details Textual) - USD ($) |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jan. 28, 2022 | Jan. 25, 2022 | Jan. 31, 2022 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Jan. 27, 2022
Change in Amount, Change Due to Non-cash Majority Stockholders Control Agreement, Expense |  |  |  | $ (420,000) | $ 0 |  |
Additional Paid in Capital, Total |  |  |  | $ 20,629,000 |  | $ 17,231,000 |
NMS [Member] | Minimum [Member] |  |  |  |  |  |  |
Percent of Reimbursement |  |  |  | 4.00% |  |  |
NMS [Member] | Maximum [Member] |  |  |  |  |  |  |
Percent of Reimbursement |  |  |  | 10.00% |  |  |
JKC [Member] | SPAR BSMT Joint Venture [Member] |  |  |  |  |  |  |
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage |  |  |  | 39.00% |  |  |
EILLC [Member] | SPAR BSMT Joint Venture [Member] |  |  |  |  |  |  |
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage |  |  |  | 10.00% |  |  |
NMS [Member] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  | 49.00% |  |  |
NSRS [Member] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  | 100.00% |  |  |
Resource Plus, Inc [Member] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  | 49.00% |  |  |
RJ Holdings [Member] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  | 50.00% |  |  |
Meridian [Member] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  | 51.00% |  |  |
Mr. Adrian Wingfield [Member] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  | 49.00% |  |  |
Sparfacts [Member] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  | 51.00% |  |  |
Sparfacts [Member] | Lydna Chapman [Member] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  | 49.00% |  |  |
FRIEDSHELF 401 Proprietary Limited [Member] | Meridian [Member] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  | 23.00% |
Lindicom Proprietary Limited [Member] | Meridian [Member] |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  | 26.00% |
CIC Agreement [Member] |  |  |  |  |  |  |
Change in Amount, Change Due to Non-cash Majority Stockholders Control Agreement, Expense |  |  |  |  |  | $ 4,477,585 |
Preferred Stock, Shares Issuable (in shares) |  |  |  |  |  | 2,000,000 |
Preferred Stock, Value, Issued, Ending Balance | $ 3,690,000 |  |  |  |  |  |
Share Price (in dollars per share) | $ 1.09 |  |  |  |  | $ 1.23 |
Preferred Stock, Shares Issued, Total (in shares) |  |  |  |  |  | 3,000,000 |
CIC Agreement [Member] | James R. Brown [Member] |  |  |  |  |  |  |
Cash Payment | $ 250,000 |  |  |  |  |  |
Related Party Transactions, Maximum Amount of Reimbursement for Legal Fees | 35,000 |  |  |  |  |  |
CIC Agreement [Member] | SAS [Member] |  |  |  |  |  |  |
Related Party Transactions, Settlement of Obligations and Related Claim | $ 502,585 |  |  |  |  |  |
CIC Agreement [Member] | Preferred Stock [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |
Additional Paid in Capital, Total |  |  |  | $ 3,270,000 |  |  |
Adjustments To Additional Paid in Capital, Stock Re-evaluated |  |  |  | $ 420,000 |  |  |
CIC Agreement [Member] | Conversion of Series B Preferred Stock into Common Stock [Member] |  |  |  |  |  |  |
Conversion of Stock, Shares Converted (in shares) |  |  | 2,000,000 | 350,000 |  |  |
Conversion of Stock, Shares Issued (in shares) |  |  |  | 525,000 |  |  |
James R. Brown [Member] | Brown Advisor Agreement [Member] |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction |  | $ 55,000 |  |  |  |  |
Thenablers, Ltd. [Member] | Lazaretos Consulting Agreement [Member] |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction, Rate Per Month |  |  |  |  |  |  | $ 10,000
NMS [Member] |  |  |  |  |  |  |
Majority Interest Ownership Percentage By Parent |  |  |  | 51.00% |  |  |
Related Party Transaction, Expenses from Transactions with Related Party |  |  |  | $ 2,100,000 | 1,800,000 |  |
Resource Plus, Inc [Member] |  |  |  |  |  |  |
Majority Interest Ownership Percentage By Parent |  |  |  | 51.00% |  |  |
Related Party Transaction, Expenses from Transactions with Related Party |  |  |  | $ 180,000 | 290,000 |  |
SPAR Todopromo [Member] |  |  |  |  |  |  |
Majority Interest Ownership Percentage By Parent |  |  |  | 51.00% |  |  |
Sparfacts [Member] | Office lease, Accounting and Consultant Services [Member] |  |  |  |  |  |  |
Related Party Transaction, Expenses from Transactions with Related Party |  |  |  | $ 91,000 | $ 76,000 |  |
SAS [Member] | Premium Adjustments [Member] |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction |  |  |  | 220,558 |  |  |
SAS [Member] | Remaining Premium Adjustments [Member] |  |  |  |  |  |  |
Related Party Transaction, Amounts of Transaction |  |  |  | 1,102,790 |  |  |
William Bartels [Member] |  |  |  |  |  |  |
Liability, Pension and Other Postretirement and Postemployment Benefits, Current |  |  |  | $ 355,918 |  |  |

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