Consolidated Statements of Changes in Shareholders' Equity - USD ($)		Total	Common Stock	Preferred Stock Preferred Shares, Series A	Preferred Stock Preferred Shares, Series B	Common Shares		Common Shares Common Stock		Accumulated Other Comprehensive Income (Loss)	Unearned Compensation	Retained Earnings
Shares, beginning balance (in shares) at Dec. 31, 2019				7,895	0	3,393,788	[1]
Stockholders' equity, beginning balance at Dec. 31, 2019		$ 51,332,000		$ 7,661,000	$ 0	$ 41,362,000				$ 0	$ (156,000)	$ 2,465,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		12,703,000										12,703,000
Issuance of common stock under non-qualified stock purchase plan (in shares)	[1]					35,795
Issuance of common stock under non-qualified stock purchase plan		$ 434,000				$ 434,000
Issuance of common stock under dividend reinvestment plan (in shares)		34,737				34,737	[1]
Issuance of common stock under dividend reinvestment plan		$ 501,000				$ 501,000
Issuance of common stock under employee stock ownership plan (in shares)	[1]					17,552
Issuance of common stock under Employee stock ownership plan		260,000				$ 260,000
Issuance of stock during the period, net (in shares)					6,760
Issuance of stock during the period, net		6,516,000			$ 6,516,000
Conversion of subordinated debt to Series B preferred stock (in shares)					500
Conversion of subordinated debt to Series B preferred stock		500,000			$ 500,000
Stock-based awards - common stock: Restricted stock (in shares)	[1]					(9,055)
Stock-based awards - common stock: Restricted stock		1,000				$ (114,000)					115,000
Stock-based awards - common stock: Stock options		372,000				$ 372,000
Stock grants (in shares)	[1]					12,201
Stock grants		228,000				$ 228,000
Conversion of preferred stock (in shares)				(1,500)	1,500
Conversion of preferred stock		0		$ (1,500,000)	$ 1,500,000
Other comprehensive income (loss), net		0
Dividend declared on preferred stock		(863,000)										(863,000)
Dividend declared on common stock		(915,000)										(915,000)
Shares, ending balance (in shares) at Dec. 31, 2020				6,395	8,760	3,485,018	[1]
Stockholders' equity, ending balance at Dec. 31, 2020		71,069,000		$ 6,161,000	$ 8,516,000	$ 43,043,000				0	(41,000)	13,390,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		24,618,000										24,618,000
Issuance of common stock under non-qualified stock purchase plan (in shares)	[1]					36,494
Issuance of common stock under non-qualified stock purchase plan		$ 662,000				$ 662,000
Issuance of common stock under dividend reinvestment plan (in shares)		17,971				17,971	[1]
Issuance of common stock under dividend reinvestment plan		$ 389,000				$ 389,000
Issuance of common stock under employee stock ownership plan (in shares)	[1]					24,920
Issuance of common stock under Employee stock ownership plan		366,000				$ 366,000
Issuance of stock during the period, net (in shares)					740			43,471	[1]
Issuance of stock during the period, net		727,000	$ 856,000		$ 727,000			$ 856,000
Unearned ESOP shares allocation		(371,000)				$ (371,000)
Stock-based awards - common stock: Restricted stock (in shares)	[1]					2,031
Stock-based awards - common stock: Restricted stock		49,000				$ 25,000					24,000
Stock-based awards - common stock: Stock options		406,000				$ 406,000
Conversion of preferred stock (in shares)					(6,290)	371,212	[1]
Conversion of preferred stock		0			$ (6,120,000)	$ 6,120,000
Other comprehensive income (loss), net		(420,000)								(420,000)
Dividend declared on preferred stock		(1,005,000)										(1,005,000)
Dividend declared on common stock		(1,056,000)										(1,056,000)
Shares, ending balance (in shares) at Dec. 31, 2021				6,395	3,210	3,981,117	[1]
Stockholders' equity, ending balance at Dec. 31, 2021		$ 96,290,000		$ 6,161,000	$ 3,123,000	$ 51,496,000				$ (420,000)	$ (17,000)	$ 35,947,000

[1] Common shares for all periods shown herein reflect the three-for-two stock split, effective on May 10, 2021.