ACQUISITION OF GIBRALTAR BANK - Additional Information (Detail) - USD ($)			3 Months Ended
	Feb. 28, 2021	Jan. 15, 2020	Mar. 31, 2021	Mar. 31, 2020
Business Acquisition [Line Items]
Issuance of common stock for initial public offering, net of expenses, shares		5,657,735
Bargain purchase gain			$ 1,933,397
Fair value of purchased financial assets with credit impairment			6,246,286
Gibraltar Bank
Business Acquisition [Line Items]
Bargain purchase gain	$ 1,933,397
Core deposit intangible	$ 400,000
Merger-related expenses			$ 318,000	$ 146,000
Estimated useful life	10 years
Fair value of purchased financial assets with credit impairment	$ 6,100,000
Gross contractual amounts receivable relating to purchased financial assets with credit deterioration	$ 6,700,000
Gibraltar Bank | Maximum
Business Acquisition [Line Items]
Measurement period for adjustments to provisional amounts	1 year
Bogota Financial, MHC
Business Acquisition [Line Items]
Issuance of common stock for initial public offering, net of expenses, shares	1,267,916	7,236,640