XML 70 R58.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Related Party Transactions (Details) - USD ($) |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 16, 2022 | Aug. 22, 2022 | Aug. 21, 2022 | Aug. 19, 2022 | Jan. 25, 2022 | Jun. 01, 2012 | Jan. 25, 2012 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2023 | Jan. 31, 2023 | Oct. 31, 2022 | Sep. 30, 2022
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change in control benchmark percentage of combined voting power |  |  |  |  |  |  |  | 30.00% |  |  |  |  |  |
Change in control benchmark percentage of voting securities |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Change In Control Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change In Control, Amount Payable, Multiple |  |  |  |  |  |  |  | 1.5 |  |  |  |  |  |
Lumpsum Payment Period |  |  |  |  |  |  |  | 45 days |  |  |  |  |  |
Employee Continuation Period |  |  |  |  |  |  |  | 6 months |  |  |  |  |  |
Employee Termination Period |  |  |  |  |  |  |  | 6 months |  |  |  |  |  |
Amended 2011 Principal Shareholder Employment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Salary paid |  |  |  |  | $ 860,000 |  |  |  |  |  |  |  |  |
Increase in salary per annum |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |
Amount payable |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,800,000
Common stock issuable, Value |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,900,000
Life insurance policy accrued amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,900,000
Salary and accrued vacation time payable |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,900,000 |
Prorated bonus |  |  |  |  |  |  |  |  |  |  | $ 633,000 |  |  |
Deferred compensation payable |  |  |  |  |  |  |  |  |  |  |  | $ 65,000 |  |
Amended 2011 Principal Shareholder Employment Agreement | 2005 Incentive Compensation Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vested shares |  | 55,000 |  |  |  |  |  |  |  |  |  |  |  |
Vested shares, Value |  | $ 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Life insurance policy surrender value |  | $ 971,000 |  |  |  |  |  |  |  |  |  |  |  |
Health coverage and life insurance policy term |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Health coverage and Life insurance premium |  | $ 800,000 |  |  |  |  |  |  |  |  |  |  |  |
Mr. Forgy Employment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Salary paid | $ 670,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in salary per annum | 4.00% |  |  |  |  | 4.00% |  |  |  |  |  |  |  |
Number of weeks of paid vacation | 35 days |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years of employment agreement | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years of extension of employment agreement | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years of non extension of employment agreement | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |
Performance Goals Achievement Period | 90 days |  |  |  |  |  |  |  |  |  |  |  |  |
Discretionary bonus |  |  |  |  |  |  |  | $ 245,000 | $ 50,000 |  |  |  |  |
Number of days for termination of employment | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years of agreement not to purchase services from solicit person | 12 months |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years for non competing | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |
Mr. Forgy Employment Agreement | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of weeks of paid vacation |  |  |  |  |  |  | 28 days |  |  |  |  |  |  |
Percentage of annual performance bonus | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Employment Agreement, Percent of Annual Performance Bonus | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Mr. Forgy Employment Agreement | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of weeks of paid vacation |  |  |  |  |  |  | 42 days |  |  |  |  |  |  |
Percentage of annual performance bonus | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Employment Agreement, Percent of Annual Performance Bonus | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Mr. Forgy Employment Agreement | Employment Termination by Company Without Cause |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years of employment agreement | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years of extension of employment agreement | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |
Number of months of continuation of base salary | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years of continuation of base salary from initial term | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |
Mr. Forgy Employment Agreement | Employment Termination When Company Not Consenting Renewal |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years of continuation of base salary from initial term | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of sum related party entitled to receive on base salary | 150.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Former Shareholder |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estate Ownership Percentage |  |  |  | 16.00% |  |  |  |  |  |  |  |  |  |
Warren S. Lada | Mr. Lada's Letter Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Salary paid |  |  | $ 750,000 |  |  |  |  |  |  |  |  |  |  |
Number of days in weeks of transportation provided |  |  | 3 days |  |  |  |  |  |  |  |  |  |  |
Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vested shares |  |  |  |  |  |  |  | 37,224 | 75,763 | 41,059 |  |  |  |
Share price |  |  |  |  |  |  |  | $ 26.74 | $ 25.45 | $ 33.85 |  |  |  |
Restricted Stock | Amended 2011 Principal Shareholder Employment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share price |  | $ 24.80 |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition The multiple of average salary and bonuses payable for each of the three immediately preceding periods of twelve consecutive months, upon change in control of the company. + References No definition available. + Details
Name: | sga_ChangeInControlAmountPayableMultiple
Namespace Prefix: | sga_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Change in control benchmark percentage of combined voting power. + References No definition available. + Details
Name: | sga_ChangeInControlBenchmarkPercentageOfCombinedVotingPower
Namespace Prefix: | sga_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Change in control benchmark percentage of voting securities. + References No definition available. + Details
Name: | sga_ChangeInControlBenchmarkPercentageOfVotingSecurities
Namespace Prefix: | sga_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum threshold percentage used for determination of compensation to key management personnel. + References No definition available. + Details
Name: | sga_CompensationAnnualIncreaseMaximumThresholdPercentage
Namespace Prefix: | sga_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Liability for life insurance coverage under the deferred compensation arrangement. + References No definition available. + Details
Name: | sga_DeferredCompensationArrangementWithIndividualLifeInsurance
Namespace Prefix: | sga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Liability for accrued life insurance coverage under the deferred compensation arrangement. + References No definition available. + Details
Name: | sga_DeferredCompensationArrangementWithIndividualLifeInsuranceAccrued
Namespace Prefix: | sga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash surrender value of life insurance policy under deferred compensation arrangement. + References No definition available. + Details
Name: | sga_DeferredCompensationArrangementWithIndividualLifeInsuranceSurrenderValue
Namespace Prefix: | sga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The prorated bonus pertaining to the deferred compensation arrangement. + References No definition available. + Details
Name: | sga_DeferredCompensationArrangementWithIndividualProratedBonus
Namespace Prefix: | sga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Liability for payment of base salary and accrued vacation time under the deferred compensation arrangement. + References No definition available. + Details
Name: | sga_DeferredCompensationArrangementWithIndividualSalaryAndAccruedVacationTime
Namespace Prefix: | sga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The period during which the employee is to continue working on receiving the lumpsum amount under the change in control agreement. + References No definition available. + Details
Name: | sga_EmployeeContinuationPeriod
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period during which the company may terminate the employee without cause, under the change in control agreement. + References No definition available. + Details
Name: | sga_EmployeeTerminationPeriod
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The discretionary bonus payable under employment agreement. + References No definition available. + Details
Name: | sga_EmploymentAgreementDiscretionaryBonus
Namespace Prefix: | sga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The non compete period under employment agreement. + References No definition available. + Details
Name: | sga_EmploymentAgreementNonCompetePeriod
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The service purchase period for non competing under employment agreement. + References No definition available. + Details
Name: | sga_EmploymentAgreementNonCompetePeriodServicePurchasePeriod
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period of notice to be given for not extending the service period under employment agreement. + References No definition available. + Details
Name: | sga_EmploymentAgreementNoticePeriodForNotExtendingInitialTerm
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period of notice to be given for termination of employment. + References No definition available. + Details
Name: | sga_EmploymentAgreementNoticePeriodForTerminationOfEmployment
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The paid vacation term under employment agreement. + References No definition available. + Details
Name: | sga_EmploymentAgreementPaidVacationTerm
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percent of performance bonus payable under employment agreement. + References No definition available. + Details
Name: | sga_EmploymentAgreementPercentOfAnnualPerformanceBonus
Namespace Prefix: | sga_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of transportation provided, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | sga_EmploymentAgreementPeriodOfTransportationProvided
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period the individual is required to perform services under employment agreement. + References No definition available. + Details
Name: | sga_EmploymentAgreementRequisiteServicePeriod
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The extended period the individual is required to perform services under employment agreement. + References No definition available. + Details
Name: | sga_EmploymentAgreementRequisiteServicePeriodExtendedTerm
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period for which health insurance is provided by the company. + References No definition available. + Details
Name: | sga_HealthInsuranceProvidedPeriod
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period during which the lumpsum amount is to be paid under the change in control agreement. + References No definition available. + Details
Name: | sga_LumpsumPaymentPeriod
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percent of common stock outstanding in estate planning trust of former chief executive officer. + References No definition available. + Details
Name: | sga_PercentOfCommonStockOutstandingInEstatePlanningTrustOfFormerChiefExecutiveOfficer
Namespace Prefix: | sga_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period for achieving performance goals for bonus payments under employment agreement. + References No definition available. + Details
Name: | sga_PerformanceGoalsAchievementPeriod
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Liability for extension of health coverage and life insurance coverage in instances where coverage under the plan would otherwise end. + References No definition available. + Details
Name: | sga_SupplementalUnemploymentBenefitsContinuationOfHealthCareAndLifeInsurance
Namespace Prefix: | sga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The period to continue an employee's insurance premium after termination of employment. + References No definition available. + Details
Name: | sga_SupplementalUnemploymentBenefitsInsurancePremiumPaymentPeriod
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percent of liability for payments of benefits due to terminated employees. + References No definition available. + Details
Name: | sga_SupplementalUnemploymentBenefitsPercent
Namespace Prefix: | sga_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period to continue an employee's salary after termination of employment. + References No definition available. + Details
Name: | sga_SupplementalUnemploymentBenefitsSalaryContinuationPeriod
Namespace Prefix: | sga_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -SubTopic 10 -Name Accounting Standards Codification -Section 30 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483043/710-10-30-1 + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable within one year (or the operating cycle, if longer). Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -SubTopic 10 -Name Accounting Standards Codification -Section 25 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483070/710-10-25-9 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483043/710-10-30-2 + Details
Name: | us-gaap_DeferredCompensationLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense for salary and wage arising from service rendered by officer. Excludes allocated cost, labor-related nonsalary expense, and direct and overhead labor cost included in cost of good and service sold. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_OfficersCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)(2)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)(2)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(g)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate value of stock related to Restricted Stock Awards issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=sga_ChangeInControlAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=sga_Amended2011PrincipalShareholderEmploymentAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=sga_IncentiveCompensationPlan2005Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=sga_Mr.ForgyEmploymentAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=sga_EmploymentTerminationByCompanyWithoutCauseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=sga_EmploymentTerminationWhenCompanyNotConsentingRenewalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sga_FormerShareholderMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sga_WarrenS.LadaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=sga_WarrenSLadaEmploymentAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |