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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