Loans - Loan Balances by Loan Classification Allocated Between Past Due Performing and Non-performing (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	$ 668,195	$ 661,498
30 - 89 Days Past Due	1,939	809
Non-accrual loans	1,064	1,430
Total loans, gross	671,198	663,737
Multi-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	26,377	26,067
Total loans, gross	26,377	26,067
One-to-Four Family Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	173,754	174,962
30 - 89 Days Past Due	502	614
Non-accrual loans	18	62
Total loans, gross	174,274	175,638
Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	31,158	32,525
30 - 89 Days Past Due	153	158
Non-accrual loans	96	98
Total loans, gross	31,407	32,781
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	36,571	38,548
Non-accrual loans	152	152
Total loans, gross	36,723	38,700
Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	18,745	12,175
Total loans, gross	18,745	12,175
Non-Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	247,963	241,809
Non-accrual loans	322	581
Total loans, gross	248,285	242,390
Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	32,667	34,041
30 - 89 Days Past Due	575
Total loans, gross	33,242	34,041
Junior Liens [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	991	1,033
Non-accrual loans	4	4
Total loans, gross	995	1,037
Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	8,051	8,408
30 - 89 Days Past Due	8	26
Non-accrual loans	1	8
Total loans, gross	8,060	8,442
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Currently Performing	91,918	91,930
30 - 89 Days Past Due	701	11
Non-accrual loans	471	525
Total loans, gross	$ 93,090	$ 92,466

Financing receivable recorded investment 30 to 89 days past due.

No definition available.

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- Definition

Financing receivables that are current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

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- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

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