Segment Information - Summary of Segment Information (Detail) - USD ($)		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net interest income		$ 5,267,000	$ 5,091,000
Provision (credit) for loan losses		71,000	(213,000)
Net interest income after provision (credit) for loan losses		5,196,000	5,304,000
Non-interest income:
Customer service fees		365,000	367,000
Gain on loan origination and sale activities, net	[1]	1,991,000	11,674,000
Mortgage servicing fees, net		348,000	779,000
Other		215,000	284,000
Total non-interest income		2,919,000	13,104,000
Non-interest expenses:
Salaries and employee benefits		5,154,000	8,437,000
Occupancy and equipment		365,000	744,000
Other non-interest expenses		3,187,000	2,770,000
Total non-interest expenses		8,706,000	11,951,000
Income (loss) before income taxes and elimination of inter-segment profit		(591,000)	6,457,000
Elimination of inter-segment profit		(727,000)	(681,000)
Income (loss) before income taxes		(1,318,000)	5,776,000
Income tax expense (benefit)		(1,083,000)	1,664,000
Net income (loss)		(235,000)	4,112,000
Total assets		770,284,000	738,188,000	$ 803,278,000
Envision Bank [Member]
Segment Reporting Information [Line Items]
Net interest income		5,011,000	4,201,000
Provision (credit) for loan losses		71,000	(213,000)
Net interest income after provision (credit) for loan losses		4,940,000	4,414,000
Non-interest income:
Customer service fees		355,000	340,000
Mortgage servicing fees, net		(205,000)	(94,000)
Other		99,000	151,000
Total non-interest income		249,000	397,000
Non-interest expenses:
Salaries and employee benefits		1,935,000	1,802,000
Occupancy and equipment		512,000	443,000
Other non-interest expenses		1,911,000	1,087,000
Total non-interest expenses		4,358,000	3,332,000
Income (loss) before income taxes and elimination of inter-segment profit		831,000	1,479,000
Total assets		702,326,000	581,954,000
Envision Mortgage [Member]
Segment Reporting Information [Line Items]
Net interest income		256,000	890,000
Net interest income after provision (credit) for loan losses		256,000	890,000
Non-interest income:
Customer service fees		10,000	27,000
Gain on loan origination and sale activities, net	[1]	1,991,000	11,674,000
Mortgage servicing fees, net		553,000	873,000
Other		116,000	133,000
Total non-interest income		2,670,000	12,707,000
Non-interest expenses:
Salaries and employee benefits		3,219,000	6,635,000
Occupancy and equipment		(147,000)	301,000
Other non-interest expenses		1,276,000	1,683,000
Total non-interest expenses		4,348,000	8,619,000
Income (loss) before income taxes and elimination of inter-segment profit		(1,422,000)	4,978,000
Total assets		$ 67,958,000	$ 156,234,000

[1] Before elimination of inter-segment profit.