Represents the balance deducted from a related-party deposit in order to settle premiums and other related fees.

No definition available.

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- Definition

Represents the amount of decrease in related party deposit liabilities during the period.

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No definition available.

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Represents the amount the specified legal entity demands to be repaid from the specified related party.

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No definition available.

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- Definition

Represents the amount of additional cash refund and credits that could be received by the specified legal entity in the near future against obligations to a related party, according to the specified related party.

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No definition available.

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- Definition

The annual medical benefits to be paid per year under the five year period agreement.

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No definition available.

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The amount of regular fees per year to be paid under five year period agreement.

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No definition available.

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The amount of supplemental fees to be paid per year under five year period agreement.

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No definition available.

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The amount of retirement compensation under the five year period agreement.

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No definition available.

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Represents the number of equal annual installments over which the damages will (or may, if settlement is approved) be paid.

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No definition available.

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The value (monetary amount) of the yearly award the plaintiff seeks in the legal matter.

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No definition available.

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The parent entity's majority interest in net assets of the subsidiary, expressed as a percentage.

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Represents number of vehicles leased under lease arrangement.

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Represents number of vehicles subleased.

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Represents the amount of operating lease expense per month.

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The cash outflow for reimbursement expenses, net of amounts owed.

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No definition available.

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Represents the amount of advances paid to a related party.

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Represents the percentage of reimbursement based on total cost.

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Represents percentage of stockholders' shares.

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The amount of reimbursement expenses offered by the company.

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Represents the amount of related-party deposit refunded in cash to the related party by the specified legal entity.

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Represents the amount of related-party expenses approved by the reporting entity's Audit Committee.

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Represents the amount of related-party expenses disallowed by the reporting entity's Audit Committee.

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Percentage of ownership by a related person in a related entity.

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Represents the amount of related-party security deposit financed by the specified legal entity.

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Represents the amount refunded to a related party during the period.

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Represents the amount by which the related-party deposit could be reduced in cash payments and credits.

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Represents the amount of security advance for which the specified legal entity demands payment from a related party.

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Represents the amount of reserve recorded against related-party receivables.

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Amount before discount awarded from other party pursuant to the settlement agreement.

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The amount of monthly payment pursuant to the settlement agreement.

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Represents the amount reserved by the reporting entity under the settlement agreement, but which reservation does not release the other party's obligations.

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No definition available.

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Represents the amount accepted for settlement.

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Represents the amount of offered for settlement.

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Amount of settlement and other charges.

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The amount of periodic payments made in a settlement agreement.

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For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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Carrying amount as of the balance sheet date of obligations due all related parties.

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Amount of cash outflow reducing loss contingency liability.

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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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Amount of cost (reversal of cost) for pension and other postretirement benefits.

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Amount of deposits held by the entity for a related party (entity, shareholder, employee).

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Amount of transactions with related party during the financial reporting period.

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The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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Note 5 - Related-party Transactions (Details Textual)											1 Months Ended						3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended		26 Months Ended	27 Months Ended
Note 5 - Related-party Transactions (Details Textual)	Mar. 17, 2020 USD ($)	Mar. 06, 2020 USD ($)	Jan. 18, 2020 USD ($)	Jan. 01, 2020 USD ($)	Oct. 30, 2019 USD ($)	Oct. 08, 2019 USD ($)	Jul. 26, 2019 USD ($)	Mar. 18, 2019 USD ($)	Sep. 19, 2018 USD ($)	Sep. 08, 2016	May 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jan. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Nov. 30, 2019 USD ($)	Jul. 31, 2018 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2020	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jul. 08, 2020 USD ($)	May 07, 2018 USD ($)
Security Advances [Member]
Reserve for Related-party Receivables																					$ 901,000
NMS [Member]
Percent of Reimbursement																			1.00%
Merhold Property Trust [Member]
Number Of Vehicles Subleased																			32
Number Of Vehicles Leased																			173
SGRP Holdings [Member] \| SPAR BSMT Joint Venture [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage										51.00%
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%
SMF [Member] \| SAS [Member]
Due from Related Parties, Total																			$ 226,000			$ 226,000	$ 226,000
Security Deposit																			$ 675,000			$ 675,000	$ 675,000
EILLC [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																			10.00%			10.00%	10.00%
NMS [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																			49.00%			49.00%	49.00%
NSRS [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																			100.00%			100.00%	100.00%
Resource Plus, Inc [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																			49.00%			49.00%	49.00%
RJ Holdings [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																			50.00%			50.00%	50.00%
FRIEDSHELF 401 Proprietary Limited [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																			23.00%			23.00%	23.00%
Lindicom Proprietary Limited [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																			26.00%			26.00%	26.00%
SPAR Todopromo [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																			49.00%			49.00%	49.00%
Settlement Agreement with SBS [Member]
Loss Contingency, Damages Sought, Value				$ 2,200,000
Settlement Agreement, Amount Awarded, Before Discount							$ 0
Settlement and Other Charges				174,097																$ 174,097
Settlement Agreement, Amount Awarded, Monthly Payment				7,254
Settlement, Periodic Payment				$ 7,254															$ 79,794
Settlement Agreement, Amount Reserved By the Company																			174,097			$ 174,097	$ 174,097
Robert G. Brown Demand for Payment [Member] \| Robert G. Brown [Member]
Loss Contingency, Damages Sought, Value	$ 1,300,000																$ 3,000,000
SPAR InfoTech, Inc. [Member] \| Alleged Lost Tax Benefits and Other Expenses [Member]
Loss Contingency, Damages Sought, Value									$ 190,000
Reimbursement for SMF's funding of the Affinity Security Deposits [Member]
Loss Contingency, Damages Sought, Value								$ 378,838
Reimbursement for SMF's Funding of the Field Payment Checks [Member]
Loss Contingency, Damages Sought, Value								12,963
SBS Clothier Litigation [Member]
Loss Contingency, Damages Sought, Value								$ 1,839,459
Settlement and Other Charges																					$ 1,300,000
Loss Contingency, Damages Number of Equal Annual Installments																				4
SAS [Member]
Reimbursement Expenses Offered																									$ 237,500
Due from Related Parties, Total																									226,000
Payment for Reimbursement Expenses Net Of Amounts Owed																									$ 11,500
SAS [Member] \| Advances for Affinity Insurance Plan [Member]
Related Party Transaction, Amounts of Transaction																			921,000
SAS [Member] \| Return of Security Advances and Preimum Advances [Member]
Due from Related Parties, Total																								$ 901,000
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
SAS [Member] \| SMF [Member] \| Security Deposit to Procure Insurance Coverage [Member]
Payments of Related-party Advances																$ 296,000
SAS [Member] \| SMF [Member] \| Monies Advanced By SMF to SAS for Quarterly Premium Installments [Member]
Due to Related Parties, Amount Demanded to Be Repaid																								$ 226,000
SAS [Member] \| SMF [Member] \| Payment of Advanced Insurance Premiums Due to Affinity [Member]
Payments of Related-party Advances																						226,000
SAS [Member] \| SBS [Member] \| Security Deposit to Procure Insurance Coverage [Member]
Payments of Related-party Advances																379,000
SAS [Member] \| Affinity Insurance [Member] \| Security Deposit to Procure Insurance Coverage [Member]
Due from Related Parties, Total																			$ 138,000			138,000	$ 138,000
Related-party Deposit Refunded in Cash																						177,000
Balance Deducted from Related-party Deposit to Settle Premiums and Other Related Fees																						312,000
SAS [Member] \| Affinity Insurance [Member] \| Security Deposit to Procure Insurance Coverage [Member] \| Expenses Due and Payable to Affinity Incurred by SAS after SMF Terminated the SMF Agreement [Member]
Balance Deducted from Related-party Deposit to Settle Premiums and Other Related Fees																						102,000
SAS [Member] \| Affinity Insurance [Member] \| Security Deposit to Procure Insurance Coverage [Member] \| AmountsIncurred by SAS as Additional Premium Assessments By Affinity [Member]
Balance Deducted from Related-party Deposit to Settle Premiums and Other Related Fees																						$ 210,000
SAS [Member] \| Affinity Insurance [Member] \| Monies Advanced By SMF to SAS for Quarterly Premium Installments [Member]
Related Party Transaction, Amount Refunded											$ 94,414
SAS [Member] \| SRS [Member] \| Security Advances [Member]
Due from Related Parties, Total																180,000
SPAR InfoTech, Inc. [Member] \| Alleged Lost Tax Benefits and Other Expenses [Member]
Loss Contingency, Damages Sought, Value									190,000
Related-party Expenses Allowed by the Audit Committee									50,000
Related-party Expenses Disallowed By the Audit Committee									150,000
SPAR InfoTech, Inc. [Member] \| Allegedly Owed Programming Services [Member]
Loss Contingency, Damages Sought, Value									900,000
SPAR InfoTech, Inc. [Member] \| Infotech Action and the Romanian Claim [Member]
Settlement, Amount Offered						$ 225,000
Settlement, Amount Accepted						$ 275,000
Loss Contingency, Damages Number of Equal Annual Installments						4
Loss Contingency Accrual, Payments					$ 75,000								$ 50,000	$ 75,000	$ 75,000
NMS [Member]
Majority Interest Ownership Percentage By Parent																			51.00%			51.00%	51.00%
Operating Lease, Expense Per Month																			$ 2,000
Resource Plus, Inc [Member]
Majority Interest Ownership Percentage By Parent																			51.00%			51.00%	51.00%
Robert G. Brown [Member]
Related-party Expenses Allowed by the Audit Committee									50,000
Related-party Expenses Disallowed By the Audit Committee									$ 150,000
Robert G. Brown [Member] \| Robert G. Brown Demand for Payment [Member]
Loss Contingency, Damages Sought, Value		$ 1,707,374
Loss Contingency, Yearly Damages Sought, Value												$ 500,000
Meridian [Member]
Majority Interest Ownership Percentage By Parent																			51.00%			51.00%	51.00%
Mr. Mason [Member] \| Merhold Property Trust [Member]
Related Party Ownership Percentage																			1.00%
Mr. Mason and Mr. Bristow [Member] \| Merhold Cape Property Trust [Member]
Related Party Ownership Percentage																			1.00%
SPAR Todopromo [Member]
Majority Interest Ownership Percentage By Parent																			51.00%			51.00%	51.00%
Mr. Juan F. Medina Domenzain [Member] \| CON [Member]
Related Party Ownership Percentage																		90.00%
Affinity Insurance [Member] \| SMF [Member] \| Security Deposit to Procure Insurance Coverage [Member]
Related-party Security Deposit Financed																675,000
Related-partySecurity Advance, Amount Demanded to Be Repaid																			$ 675,000			$ 675,000	$ 675,000
Affinity Insurance [Member] \| SAS [Member] \| Security Deposit to Procure Insurance Coverage [Member]
Related Party Deposit Liabilities																$ 965,000			476,000			476,000	476,000
Decrease in Related Party Deposit Liabilities																							489,000
Due to Related Party, Additional Cash Refund and Credits That Could Be Received Against Obligations																			338,000			338,000	338,000
Related Party Transactions, Amount By Which Deposit Could Be Reduced in Cash Payments and Credits																			827,000			827,000	827,000
SMF [Member] \| SAS [Member] \| Security Deposit to Procure Insurance Coverage [Member]
Due to Related Parties, Total																			489,000			489,000	489,000
SMF [Member] \| SAS [Member] \| Monies Advanced By SMF to SAS for Quarterly Premium Installments [Member]
Due to Related Parties, Total																			226,000			$ 226,000	$ 226,000
William Bartels [Member]
Five Yer Period Agreement, Retirement Compensation			$ 100,000
Five Year Period Agreement, Annual Regular Fees			55,000
Five Year Period Agreement, Annual Supplemental Fees			50,000
Five Year Period Agreement, Annual Medical Benefits			$ 15,588
William Bartels [Member] \| SPAR Group [Member]
Pension and Other Postretirement Benefits Cost (Reversal of Cost), Total																			$ 700,000
Percentage of Stockholders' Shares																			25.10%			25.10%	25.10%