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Earnings Per Common Share (Details Narrative) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2011
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]            
Deferred Compensation Arrangements, Overall, Description     At September 30, 2022 and December 31, 2021, there were 92,142 and 85,765 units in the plan, respectively. The equity related to the plan at September 30, 2022 and December 31, 2021 amounted to $1.2 million and $1.1 million, respectively, and is included in “Nonvested restricted stock and stock units” on the balance sheet.      
Deferred Compensation Liability, Current and Noncurrent $ 1,200,000   $ 1,200,000   $ 1,100,000  
First Community Corporatin 2011 Stock Incentive Plan [Member]            
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]            
Employee Stock Ownership Plan (ESOP), Plan Description           In 2011, the Company and its shareholders adopted a stock incentive plan whereby 350,000 shares were reserved for issuance by the Company upon the grant of stock options or restricted stock awards under the plan (the “2011 Plan”). The 2011 Plan provided for the grant of options to key employees and directors as determined by a stock option committee made up of at least two members of the board of directors.
Employee Stock Ownership Plan (ESOP), Shares in ESOP           350,000
First Community Corporation 2011 Stock Incentive Plan [Member]            
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]            
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount 155,200   155,200   293,900  
Employee Stock Ownership Plan (ESOP), Compensation Expense 44,200 $ 93,400 138,700 $ 271,000.0    
First Community Corporation 2011 Stock Incentive Plan [Member] | Time-Based Restricted Stock Unit [Member]            
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]            
Employee Stock Ownership Plan (ESOP), Compensation Expense 4,800 8,300 16,700 32,900    
Accured Compensation Cost over Vesting Period 8,000.0   8,000.0   22,300  
First Community Corporation 2011 Stock Incentive Plan [Member] | Performance-Based Restricted Stock Units [Member]            
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]            
Employee Stock Ownership Plan (ESOP), Compensation Expense 19,500 $ 19,500 58,500 $ 45,500    
Accured Compensation Cost over Vesting Period 110,500   110,500   $ 130,000.0  
First Community Corporation 2021 Omnibus Equity Incentive Plan [Member]            
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]            
Employee Stock Ownership Plan (ESOP), Plan Description         In 2021, the Company and its shareholders adopted an omnibus equity incentive plan whereby 225,000 shares were reserved for issuance by the Company to help the company attract, retain and motivate directors, officers, employees, consultants and advisors of the Company and its subsidiaries (the “2021 Plan”).  
Employee Stock Ownership Plan (ESOP), Shares in ESOP         225,000  
Employee Stock Ownership Plan (ESOP), Compensation Expense 45,600   119,300      
Accured Compensation Cost over Vesting Period 80,300   80,300      
First Community Corporation 2021 Omnibus Equity Incentive Plan [Member] | Time-Based Restricted Stock Unit [Member]            
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]            
Employee Stock Ownership Plan (ESOP), Compensation Expense 20,500   54,600      
First Community Corporation 2021 Omnibus Equity Incentive Plan [Member] | Performance-Based Restricted Stock Units [Member]            
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]            
Employee Stock Ownership Plan (ESOP), Compensation Expense $ 20,500   $ 54,600