Loans and Allowance for Loan and Lease Losses - Loans By Credit Quality Indicators (Details) - USD ($) $ in Thousands		Dec. 31, 2020		Dec. 31, 2019
Financing Receivable Recorded Investment [Line Items]
Loans		$ 650,123		$ 556,053
As a percentage of total loans		100.00%		100.00%
Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		$ 289,674
As a percentage of total loans		99.12%
Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		$ 2,578
As a percentage of total loans		0.88%
Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		$ 292,252
As a percentage of total loans		100.00%
FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		$ 591,000		$ 442,455
ALC [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		59,123		113,598
ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				$ 217,177
As a percentage of total loans				98.54%
ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				$ 3,208
As a percentage of total loans				1.46%
ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				$ 220,385
As a percentage of total loans				100.00%
Construction, Land Development and Other Land Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		37,282		$ 30,820
Secured By Multi family Residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		54,326		50,910
Secured By Non-farm Non residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		184,528		162,981
Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		$ 88,856		104,537
Direct Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				$ 38,040
Pass And Criticized [Member}
Financing Receivable Recorded Investment [Line Items]
As a percentage of total loans		95.33%		97.58%
Pass And Criticized [Member} | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		$ 341,137		$ 327,557
Pass And Criticized [Member}
Financing Receivable Recorded Investment [Line Items]
As a percentage of total loans		2.70%		1.20%
Pass And Criticized [Member} | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		$ 9,672		$ 4,029
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
As a percentage of total loans		1.97%		1.22%
Substandard [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		$ 7,062		$ 4,082
Pass And Criticized [Member}
Financing Receivable Recorded Investment [Line Items]
As a percentage of total loans		100.00%		100.00%
Pass And Criticized [Member} | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		$ 357,871		$ 335,668
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		37,282		30,820
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		37,282		30,820
Real Estate [Member] | Secured By Multi family Residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		54,326		50,910
Real Estate [Member] | Secured By Multi family Residential Properties [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		54,326		50,910
Real Estate [Member] | Secured By Non-farm Non residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		184,528		162,981
Real Estate [Member] | Secured By Non-farm Non residential Properties [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		184,528		162,981
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		88,856		104,537
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		86,665
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		2,191
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		88,856
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		85,271		98,971
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | ALC [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		3,585		5,566
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				102,176
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				2,361
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				104,537
Real Estate [Member] | Pass And Criticized [Member} | Construction, Land Development and Other Land Loans [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		36,719		30,466
Real Estate [Member] | Pass And Criticized [Member} | Secured By Multi family Residential Properties [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		54,326		50,910
Real Estate [Member] | Pass And Criticized [Member} | Secured By Non-farm Non residential Properties [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		170,338		157,718
Real Estate [Member] | Pass And Criticized [Member} | Construction, Land Development and Other Land Loans [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		558		354
Real Estate [Member] | Pass And Criticized [Member} | Secured By Non-farm Non residential Properties [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		8,572		2,961
Real Estate [Member] | Substandard [Member] | Construction, Land Development and Other Land Loans [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		5
Real Estate [Member] | Substandard [Member] | Secured By Non-farm Non residential Properties [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		5,618		2,302
Real Estate [Member] | Pass And Criticized [Member} | Construction, Land Development and Other Land Loans [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		37,282		30,820
Real Estate [Member] | Pass And Criticized [Member} | Secured By Multi family Residential Properties [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		54,326		50,910
Real Estate [Member] | Pass And Criticized [Member} | Secured By Non-farm Non residential Properties [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		184,528		162,981
Commercial and Industrial Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	[1]	81,735		90,957
Commercial and Industrial Loans [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	[1]	81,735		90,957
Commercial and Industrial Loans [Member] | Pass And Criticized [Member} | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		79,754		88,463
Commercial and Industrial Loans [Member] | Pass And Criticized [Member} | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		542		714
Commercial and Industrial Loans [Member] | Substandard [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		1,439		1,780
Commercial and Industrial Loans [Member] | Pass And Criticized [Member} | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		81,735		90,957
Consumer Portfolio Segment | Direct Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		29,788		38,040
Consumer Portfolio Segment | Direct Consumer [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		29,679
Consumer Portfolio Segment | Direct Consumer [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		109
Consumer Portfolio Segment | Direct Consumer [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		29,788
Consumer Portfolio Segment | Direct Consumer [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		6,344		7,816
Consumer Portfolio Segment | Direct Consumer [Member] | ALC [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		23,444		30,224
Consumer Portfolio Segment | Direct Consumer [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				37,474
Consumer Portfolio Segment | Direct Consumer [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				566
Consumer Portfolio Segment | Direct Consumer [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				38,040
Consumer Portfolio Segment | Branch Retail [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		32,094		32,305
Consumer Portfolio Segment | Branch Retail [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		31,816
Consumer Portfolio Segment | Branch Retail [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		278
Consumer Portfolio Segment | Branch Retail [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		32,094
Consumer Portfolio Segment | Branch Retail [Member] | ALC [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		32,094		32,305
Consumer Portfolio Segment | Branch Retail [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				32,024
Consumer Portfolio Segment | Branch Retail [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				281
Consumer Portfolio Segment | Branch Retail [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				32,305
Consumer Portfolio Segment | Indirect Sales [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		141,514	[2]	45,503
Consumer Portfolio Segment | Indirect Sales [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		141,514
Consumer Portfolio Segment | Indirect Sales [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans		141,514
Consumer Portfolio Segment | Indirect Sales [Member] | FUSB [Member]
Financing Receivable Recorded Investment [Line Items]
Loans	[2]	$ 141,514
Consumer Portfolio Segment | Indirect Sales [Member] | ALC [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				45,503
Consumer Portfolio Segment | Indirect Sales [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				45,503
Consumer Portfolio Segment | Indirect Sales [Member] | ALC [Member] | Performing And Non Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Loans				$ 45,503

[1] Includes equipment financing leases and PPP loans. As of December 31, 2020 and 2019, equipment financing leases totaled $7.0 million and $8.2 million, respectively. As of December 31, 2020, PPP loans totaled $11.9 million.

[2] Effective January 1, 2020, the Company transferred a total of $45.5 million of its indirect sales portfolio from ALC to the Bank.